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5. Influence of Ellipsoidal Dimple Column Number on Performance of Highly-loaded Compressor Cascade.

Author

Lu, H. W., Shi, Y. P., Xin, J. C., Kong, X. Z., and Peng, B. L.

Subjects
COMPRESSOR performance, DRAG (Hydrodynamics), KINETIC energy
Abstract

The impact of the column number of ellipsoidal dimples on a highly-loaded compressor cascade (NACA65-K48) under design conditions was investigated by using a numerical simulation method. Ellipsoidal dimples with a thickness of 0.2 mm were located at the position of chord length ranging from 10% to 36%. The span-wise interval was 5.0 mm. The performance and flow field structures of cascades with 1 to 5 ellipsoidal dimpled columns were compared, and the results showed that the turbulent kinetic energy intensity near the wall was enhanced and the fluid separation resistance was consequently improved. The total pressure loss was reduced by all modified ellipsoidal dimples. In addition, the separation bubble of the suction side was broken or weakened, the corner separation was improved, and the influence range of the passage vortex was reduced. Moreover, the improvement effect of cascade performance parameters initially increased with the increase in the number of dimple columns and then reduced as the number of columns was further increased. The reductions in the total pressure loss of the cascade were 0.59%, 1.47%, 1.69%, 1.91%, and 1.73% for column numbers 1 to 5, respectively. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Reproducibility in the absence of selective reporting: An illustration from large-scale brain asymmetry research

Author

Kong, X-Z, Francks, C, Kong, X-Z, and Francks, C

Abstract

The problem of poor reproducibility of scientific findings has received much attention over recent years, in a variety of fields including psychology and neuroscience. The problem has been partly attributed to publication bias and unwanted practices such as p-hacking. Low statistical power in individual studies is also understood to be an important factor. In a recent multisite collaborative study, we mapped brain anatomical left-right asymmetries for regional measures of surface area and cortical thickness, in 99 MRI datasets from around the world, for a total of over 17,000 participants. In the present study, we revisited these hemispheric effects from the perspective of reproducibility. Within each dataset, we considered that an effect had been reproduced when it matched the meta-analytic effect from the 98 other datasets, in terms of effect direction and significance threshold. In this sense, the results within each dataset were viewed as coming from separate studies in an "ideal publishing environment," that is, free from selective reporting and p hacking. We found an average reproducibility rate of 63.2% (SD = 22.9%, min = 22.2%, max = 97.0%). As expected, reproducibility was higher for larger effects and in larger datasets. Reproducibility was not obviously related to the age of participants, scanner field strength, FreeSurfer software version, cortical regional measurement reliability, or regional size. These findings constitute an empirical illustration of reproducibility in the absence of publication bias or p hacking, when assessing realistic biological effects in heterogeneous neuroscience data, and given typically-used sample sizes.

Published
2022

8. Topographic divergence of atypical cortical asymmetry and atrophy patterns in temporal lobe epilepsy

Author

Park, B-Y, Lariviere, S, Rodriguez-Cruces, R, Royer, J, Tavakol, S, Wang, Y, Caciagli, L, Caligiuri, ME, Gambardella, A, Concha, L, Keller, SS, Cendes, F, Alvim, MKM, Yasuda, C, Bonilha, L, Gleichgerrcht, E, Focke, NK, Kreilkamp, BAK, Domin, M, von Podewils, F, Langner, S, Rummel, C, Rebsamen, M, Wiest, R, Martin, P, Kotikalapudi, R, Bender, B, O'Brien, TJ, Law, M, Sinclair, B, Vivash, L, Kwan, P, Desmond, PM, Malpas, CB, Lui, E, Alhusaini, S, Doherty, CP, Cavalleri, GL, Delanty, N, Kalviainen, R, Jackson, GD, Kowalczyk, M, Mascalchi, M, Semmelroch, M, Thomas, RH, Soltanian-Zadeh, H, Davoodi-Bojd, E, Zhang, J, Lenge, M, Guerrini, R, Bartolini, E, Hamandi, K, Foley, S, Weber, B, Depondt, C, Absil, J, Carr, SJA, Abela, E, Richardson, MP, Devinsky, O, Severino, M, Striano, P, Parodi, C, Tortora, D, Hatton, SN, Vos, SB, Duncan, JS, Galovic, M, Whelan, CD, Bargallo, N, Pariente, J, Conde-Blanco, E, Vaudano, AE, Tondelli, M, Meletti, S, Kong, X-Z, Francks, C, Fisher, SE, Caldairou, B, Ryten, M, Labate, A, Sisodiya, SM, Thompson, PM, McDonald, CR, Bernasconi, A, Bernasconi, N, Bernhardt, BC, Park, B-Y, Lariviere, S, Rodriguez-Cruces, R, Royer, J, Tavakol, S, Wang, Y, Caciagli, L, Caligiuri, ME, Gambardella, A, Concha, L, Keller, SS, Cendes, F, Alvim, MKM, Yasuda, C, Bonilha, L, Gleichgerrcht, E, Focke, NK, Kreilkamp, BAK, Domin, M, von Podewils, F, Langner, S, Rummel, C, Rebsamen, M, Wiest, R, Martin, P, Kotikalapudi, R, Bender, B, O'Brien, TJ, Law, M, Sinclair, B, Vivash, L, Kwan, P, Desmond, PM, Malpas, CB, Lui, E, Alhusaini, S, Doherty, CP, Cavalleri, GL, Delanty, N, Kalviainen, R, Jackson, GD, Kowalczyk, M, Mascalchi, M, Semmelroch, M, Thomas, RH, Soltanian-Zadeh, H, Davoodi-Bojd, E, Zhang, J, Lenge, M, Guerrini, R, Bartolini, E, Hamandi, K, Foley, S, Weber, B, Depondt, C, Absil, J, Carr, SJA, Abela, E, Richardson, MP, Devinsky, O, Severino, M, Striano, P, Parodi, C, Tortora, D, Hatton, SN, Vos, SB, Duncan, JS, Galovic, M, Whelan, CD, Bargallo, N, Pariente, J, Conde-Blanco, E, Vaudano, AE, Tondelli, M, Meletti, S, Kong, X-Z, Francks, C, Fisher, SE, Caldairou, B, Ryten, M, Labate, A, Sisodiya, SM, Thompson, PM, McDonald, CR, Bernasconi, A, Bernasconi, N, and Bernhardt, BC

Abstract

Temporal lobe epilepsy, a common drug-resistant epilepsy in adults, is primarily a limbic network disorder associated with predominant unilateral hippocampal pathology. Structural MRI has provided an in vivo window into whole-brain grey matter structural alterations in temporal lobe epilepsy relative to controls, by either mapping (i) atypical inter-hemispheric asymmetry; or (ii) regional atrophy. However, similarities and differences of both atypical asymmetry and regional atrophy measures have not been systematically investigated. Here, we addressed this gap using the multisite ENIGMA-Epilepsy dataset comprising MRI brain morphological measures in 732 temporal lobe epilepsy patients and 1418 healthy controls. We compared spatial distributions of grey matter asymmetry and atrophy in temporal lobe epilepsy, contextualized their topographies relative to spatial gradients in cortical microstructure and functional connectivity calculated using 207 healthy controls obtained from Human Connectome Project and an independent dataset containing 23 temporal lobe epilepsy patients and 53 healthy controls and examined clinical associations using machine learning. We identified a marked divergence in the spatial distribution of atypical inter-hemispheric asymmetry and regional atrophy mapping. The former revealed a temporo-limbic disease signature while the latter showed diffuse and bilateral patterns. Our findings were robust across individual sites and patients. Cortical atrophy was significantly correlated with disease duration and age at seizure onset, while degrees of asymmetry did not show a significant relationship to these clinical variables. Our findings highlight that the mapping of atypical inter-hemispheric asymmetry and regional atrophy tap into two complementary aspects of temporal lobe epilepsy-related pathology, with the former revealing primary substrates in ipsilateral limbic circuits and the latter capturing bilateral disease effects. These findings refine ou

Published
2022

9. An overview of the first 5 years of the ENIGMA obsessive-compulsive disorder working group: The power of worldwide collaboration

Author

van den Heuvel, OA, Boedhoe, PSW, Bertolin, S, Bruin, WB, Francks, C, Ivanov, I, Jahanshad, N, Kong, X-Z, Kwon, JS, O'Neill, J, Paus, T, Patel, Y, Piras, F, Schmaal, L, Soriano-Mas, C, Spalletta, G, van Wingen, GA, Yun, J-Y, Vriend, C, Simpson, HB, van Rooij, D, Hoexter, MQ, Hoogman, M, Buitelaar, JK, Arnold, P, Beucke, JC, Benedetti, F, Bollettini, I, Bose, A, Brennan, BP, De Nadai, AS, Fitzgerald, K, Gruner, P, Gruenblatt, E, Hirano, Y, Huyser, C, James, A, Koch, K, Kvale, G, Lazaro, L, Lochner, C, Marsh, R, Mataix-Cols, D, Morgado, P, Nakamae, T, Nakao, T, Narayanaswamy, JC, Nurmi, E, Pittenger, C, Reddy, YCJ, Sato, JR, Soreni, N, Stewart, SE, Taylor, SF, Tolin, D, Thomopoulos, SI, Veltman, DJ, Venkatasubramanian, G, Walitza, S, Wang, Z, Thompson, PM, Stein, DJ, van den Heuvel, OA, Boedhoe, PSW, Bertolin, S, Bruin, WB, Francks, C, Ivanov, I, Jahanshad, N, Kong, X-Z, Kwon, JS, O'Neill, J, Paus, T, Patel, Y, Piras, F, Schmaal, L, Soriano-Mas, C, Spalletta, G, van Wingen, GA, Yun, J-Y, Vriend, C, Simpson, HB, van Rooij, D, Hoexter, MQ, Hoogman, M, Buitelaar, JK, Arnold, P, Beucke, JC, Benedetti, F, Bollettini, I, Bose, A, Brennan, BP, De Nadai, AS, Fitzgerald, K, Gruner, P, Gruenblatt, E, Hirano, Y, Huyser, C, James, A, Koch, K, Kvale, G, Lazaro, L, Lochner, C, Marsh, R, Mataix-Cols, D, Morgado, P, Nakamae, T, Nakao, T, Narayanaswamy, JC, Nurmi, E, Pittenger, C, Reddy, YCJ, Sato, JR, Soreni, N, Stewart, SE, Taylor, SF, Tolin, D, Thomopoulos, SI, Veltman, DJ, Venkatasubramanian, G, Walitza, S, Wang, Z, Thompson, PM, and Stein, DJ

Abstract

Neuroimaging has played an important part in advancing our understanding of the neurobiology of obsessive-compulsive disorder (OCD). At the same time, neuroimaging studies of OCD have had notable limitations, including reliance on relatively small samples. International collaborative efforts to increase statistical power by combining samples from across sites have been bolstered by the ENIGMA consortium; this provides specific technical expertise for conducting multi-site analyses, as well as access to a collaborative community of neuroimaging scientists. In this article, we outline the background to, development of, and initial findings from ENIGMA's OCD working group, which currently consists of 47 samples from 34 institutes in 15 countries on 5 continents, with a total sample of 2,323 OCD patients and 2,325 healthy controls. Initial work has focused on studies of cortical thickness and subcortical volumes, structural connectivity, and brain lateralization in children, adolescents and adults with OCD, also including the study on the commonalities and distinctions across different neurodevelopment disorders. Additional work is ongoing, employing machine learning techniques. Findings to date have contributed to the development of neurobiological models of OCD, have provided an important model of global scientific collaboration, and have had a number of clinical implications. Importantly, our work has shed new light on questions about whether structural and functional alterations found in OCD reflect neurodevelopmental changes, effects of the disease process, or medication impacts. We conclude with a summary of ongoing work by ENIGMA-OCD, and a consideration of future directions for neuroimaging research on OCD within and beyond ENIGMA.

Published
2022

10. Mapping brain asymmetry in health and disease through the ENIGMA consortium

Author

Kong, X-Z, Postema, MC, Guadalupe, T, de Kovel, C, Boedhoe, PSW, Hoogman, M, Mathias, SR, van Rooij, D, Schijven, D, Glahn, DC, Medland, SE, Jahanshad, N, Thomopoulos, S, Turner, JA, Buitelaar, J, van Erp, TGM, Franke, B, Fisher, SE, van den Heuvel, OA, Schmaal, L, Thompson, PM, Francks, C, Kong, X-Z, Postema, MC, Guadalupe, T, de Kovel, C, Boedhoe, PSW, Hoogman, M, Mathias, SR, van Rooij, D, Schijven, D, Glahn, DC, Medland, SE, Jahanshad, N, Thomopoulos, S, Turner, JA, Buitelaar, J, van Erp, TGM, Franke, B, Fisher, SE, van den Heuvel, OA, Schmaal, L, Thompson, PM, and Francks, C

Abstract

Left-right asymmetry of the human brain is one of its cardinal features, and also a complex, multivariate trait. Decades of research have suggested that brain asymmetry may be altered in psychiatric disorders. However, findings have been inconsistent and often based on small sample sizes. There are also open questions surrounding which structures are asymmetrical on average in the healthy population, and how variability in brain asymmetry relates to basic biological variables such as age and sex. Over the last 4 years, the ENIGMA-Laterality Working Group has published six studies of gray matter morphological asymmetry based on total sample sizes from roughly 3,500 to 17,000 individuals, which were between one and two orders of magnitude larger than those published in previous decades. A population-level mapping of average asymmetry was achieved, including an intriguing fronto-occipital gradient of cortical thickness asymmetry in healthy brains. ENIGMA's multi-dataset approach also supported an empirical illustration of reproducibility of hemispheric differences across datasets. Effect sizes were estimated for gray matter asymmetry based on large, international, samples in relation to age, sex, handedness, and brain volume, as well as for three psychiatric disorders: autism spectrum disorder was associated with subtly reduced asymmetry of cortical thickness at regions spread widely over the cortex; pediatric obsessive-compulsive disorder was associated with altered subcortical asymmetry; major depressive disorder was not significantly associated with changes of asymmetry. Ongoing studies are examining brain asymmetry in other disorders. Moreover, a groundwork has been laid for possibly identifying shared genetic contributions to brain asymmetry and disorders.

Published
2022

12. Steady State Models

Author

Kong, X.-Z., primary, Xu, F.-L., additional, He, W., additional, Liu, W.-X., additional, and Yang, B., additional

Published
2016
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13. Fugacity Models

Author

Kong, X.-Z., primary, Xu, F.-L., additional, He, W., additional, Liu, W.-X., additional, and Yang, B., additional

Published
2016
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14. ENIGMA and global neuroscience: A decade of large-scale studies of the brain in health and disease across more than 40 countries

Author

Thompson, P.M. (Paul), Jahanshad, N. (Neda), Ching, C.R.K. (Christopher), Salminen, L.E. (Lauren E.), Thomopoulos, S.I. (Sophia I.), Bright, J. (Joanna), Baune, B.T., Bertolín, S. (Sara), Bralten, L.B.C. (Linda), Bruin, W.B. (Willem B.), Bülow, R. (Robin), Chen, J. (Jian), Chye, Y. (Yann), Dannlowski, U. (Udo), de Kovel, C.G.F. (Carolien G F), Donohoe, D.J. (Dennis), Eyler, L.T. (Lisa T.), Faraone, S.V. (Stephen), Favre, P. (Pauline), Filippi, C.A. (Courtney A.), Frodl, T. (Thomas), Garijo, D. (Daniel), Gil, Y. (Yolanda), Grabe, H.J. (Hans Jörgen), Grasby, K.L. (Katrina L.), Hajek, T. (Tomas), Han, L.K.M. (Laura K M), Hatton, W., Hilbert, K. (Kevin), Ho, T.C. (Tiffany C.), Holleran, L. (Laurena), Homuth, G. (Georg), Hosten, N. (Norbert), Houenou, J. (Josselin), Ivanov, I. (Iliyan), Jia, T. (Tianye), Kelly, S. (Sinead), Klein, M. (Marieke), Kwon, J.S. (Jun Soo), Laansma, M.A. (Max A.), Leerssen, J. (Jeanne), Lueken, U. (Ulrike), Nunes, A. (Abraham), Neill, J.O. (Joseph O'), Opel, N. (Nils), Piras, F. (Fabrizio), Piras, F. (Federica), Postema, M.C. (Merel C.), Pozzi, E. (Elena), Shatokhina, N. (Natalia), Soriano-Mas, C. (Carles), Spalletta, G. (Gianfranco), Sun, D. (Daqiang), Teumer, A. (Alexander), Tilot, A.K. (Amanda K.), Tozzi, L. (Leonardo), van der Merwe, C. (Celia), Someren, E.J.W. (Eus) van, van Wingen, G.A. (Guido A.), Völzke, H. (Henry), Walton, E. (Esther), Wang, L. (Lei), Winkler, A.M. (Anderson), Wittfeld, K. (Katharina), Wright, M.J. (Margaret), Yun, J.-Y. (Je-Yeon), Zhang, G. (Guohao), Zhang-James, Y. (Yanli), Adhikari, B.M. (Bhim M.), Agartz, I. (Ingrid), Aghajani, M. (Moji), Aleman, A. (André), Althoff, R.R. (Robert R.), Altmann, A. (A.), Andreassen, O.A. (Ole), Baron, D.A. (David A.), Bartnik-Olson, B.L. (Brenda L.), Marie Bas-Hoogendam, J. (Janna), Baskin-Sommers, A.R. (Arielle R.), Bearden, C.E. (Carrie), Berner, L.A. (Laura A.), Boedhoe, P.S.W. (Premika S W), Brouwer, R.M. (Rachel), Buitelaar, J.K. (Jan), Caeyenberghs, K. (Karen), Cecil, C.A.M. (Charlotte), Cohen, R.A. (Ronald A.), Cole, J.H. (James H.), Conrod, P. (Patricia), De Brito, S.A. (Stephane A.), de Zwarte, S.M.C. (Sonja M C), Dennis, E.L. (Emily L.), Desrivieres, S. (Sylvane), Dima, D. (Danai), Ehrlich, S.M. (Stefan), Esopenko, C. (Carrie), Fairchild, G. (Graeme), Fisher, S.E. (Simon), Fouche, J.-P. (Jean-Paul), Francks, C. (Clyde), Frangou, S. (Sophia), Franke, B. (Barbara), Garavan, H.P. (Hugh P.), Glahn, D.C. (David), Groenewold, N.A. (Nynke A.), Gurholt, T.P. (Tiril P.), Gutman, B.A. (Boris A.), Hahn, T. (Tim), Harding, I.H. (Ian H.), Hernaus, D. (Dennis), Hibar, D.P. (Derrek P.), Hillary, F.G. (Frank G.), Hoogman, M. (Martine), Hulshoff Pol, H.E. (Hilleke E.), Jalbrzikowski, M. (Maria), Karkashadze, G.A. (George A.), Klapwijk, E.T. (Eduard T.), Knickmeyer, R.C. (Rebecca C.), Kochunov, P. (Peter), Koerte, I.K. (Inga K.), Kong, X.-Z. (Xiang-Zhen), Liew, S.-L. (Sook-Lei), Lin, A.P. (Alexander P.), Logue, M.W. (Mark W.), Luders, E. (Eileen), Macciardi, F. (Fabio), Mackey, S. (Scott), Mayer, A.R. (Andrew R.), McDonald, C.R. (Carrie R.), McMahon, A.B. (Agnes B.), Medland, S.E. (Sarah), Modinos, G. (Gemma), Morey, R.A. (Rajendra A.), Mueller, S.C. (Sven C.), Mukherjee, P. (Pratik), Namazova-Baranova, L. (L.), Nir, T.M. (Talia M.), Olsen, A. (Alexander), Paschou, P. (Peristera), Pine, D.S. (Daniel S.), Pizzagalli, F. (Fabrizio), Rentería, M.E. (Miguel), Rohrer, J.D. (Jonathan D.), Sämann, P.G. (Philipp), Schmaal, L. (Lianne), Schumann, G. (Gunter), Shiroishi, M.S. (Mark S.), Sisodiya, S.M. (Sanjay), Smit, D.J.A. (Dirk J A), Sønderby, I.E. (Ida E.), Stein, D.J. (Dan J.), Stein, J.L., Tahmasian, M. (Masoud), Tate, D.F. (David F.), Turner, J. (Jessica), Heuvel, O.A. (Odile A.), Wee, N.J. (Nic) van der, van der Werf, Y.D. (Ysbrand), Erp, T.G.M. (Theo G.) van, van Haren, N.E.M. (Neeltje E M), van Rooij, D. (Daan), Van Velzen, L.S., Veer, I.M. (Ilya), Veltman, D.J. (Dick), Villalon-Reina, J.E. (Julio E.), Walter, H.J. (Henrik), Whelan, C.D. (Christopher), Wilde, E.A. (Elisabeth A.), Zarei, M. (Mojtaba), Zelman, V. (Vladimir), Thompson, P.M. (Paul), Jahanshad, N. (Neda), Ching, C.R.K. (Christopher), Salminen, L.E. (Lauren E.), Thomopoulos, S.I. (Sophia I.), Bright, J. (Joanna), Baune, B.T., Bertolín, S. (Sara), Bralten, L.B.C. (Linda), Bruin, W.B. (Willem B.), Bülow, R. (Robin), Chen, J. (Jian), Chye, Y. (Yann), Dannlowski, U. (Udo), de Kovel, C.G.F. (Carolien G F), Donohoe, D.J. (Dennis), Eyler, L.T. (Lisa T.), Faraone, S.V. (Stephen), Favre, P. (Pauline), Filippi, C.A. (Courtney A.), Frodl, T. (Thomas), Garijo, D. (Daniel), Gil, Y. (Yolanda), Grabe, H.J. (Hans Jörgen), Grasby, K.L. (Katrina L.), Hajek, T. (Tomas), Han, L.K.M. (Laura K M), Hatton, W., Hilbert, K. (Kevin), Ho, T.C. (Tiffany C.), Holleran, L. (Laurena), Homuth, G. (Georg), Hosten, N. (Norbert), Houenou, J. (Josselin), Ivanov, I. (Iliyan), Jia, T. (Tianye), Kelly, S. (Sinead), Klein, M. (Marieke), Kwon, J.S. (Jun Soo), Laansma, M.A. (Max A.), Leerssen, J. (Jeanne), Lueken, U. (Ulrike), Nunes, A. (Abraham), Neill, J.O. (Joseph O'), Opel, N. (Nils), Piras, F. (Fabrizio), Piras, F. (Federica), Postema, M.C. (Merel C.), Pozzi, E. (Elena), Shatokhina, N. (Natalia), Soriano-Mas, C. (Carles), Spalletta, G. (Gianfranco), Sun, D. (Daqiang), Teumer, A. (Alexander), Tilot, A.K. (Amanda K.), Tozzi, L. (Leonardo), van der Merwe, C. (Celia), Someren, E.J.W. (Eus) van, van Wingen, G.A. (Guido A.), Völzke, H. (Henry), Walton, E. (Esther), Wang, L. (Lei), Winkler, A.M. (Anderson), Wittfeld, K. (Katharina), Wright, M.J. (Margaret), Yun, J.-Y. (Je-Yeon), Zhang, G. (Guohao), Zhang-James, Y. (Yanli), Adhikari, B.M. (Bhim M.), Agartz, I. (Ingrid), Aghajani, M. (Moji), Aleman, A. (André), Althoff, R.R. (Robert R.), Altmann, A. (A.), Andreassen, O.A. (Ole), Baron, D.A. (David A.), Bartnik-Olson, B.L. (Brenda L.), Marie Bas-Hoogendam, J. (Janna), Baskin-Sommers, A.R. (Arielle R.), Bearden, C.E. (Carrie), Berner, L.A. (Laura A.), Boedhoe, P.S.W. (Premika S W), Brouwer, R.M. (Rachel), Buitelaar, J.K. (Jan), Caeyenberghs, K. (Karen), Cecil, C.A.M. (Charlotte), Cohen, R.A. (Ronald A.), Cole, J.H. (James H.), Conrod, P. (Patricia), De Brito, S.A. (Stephane A.), de Zwarte, S.M.C. (Sonja M C), Dennis, E.L. (Emily L.), Desrivieres, S. (Sylvane), Dima, D. (Danai), Ehrlich, S.M. (Stefan), Esopenko, C. (Carrie), Fairchild, G. (Graeme), Fisher, S.E. (Simon), Fouche, J.-P. (Jean-Paul), Francks, C. (Clyde), Frangou, S. (Sophia), Franke, B. (Barbara), Garavan, H.P. (Hugh P.), Glahn, D.C. (David), Groenewold, N.A. (Nynke A.), Gurholt, T.P. (Tiril P.), Gutman, B.A. (Boris A.), Hahn, T. (Tim), Harding, I.H. (Ian H.), Hernaus, D. (Dennis), Hibar, D.P. (Derrek P.), Hillary, F.G. (Frank G.), Hoogman, M. (Martine), Hulshoff Pol, H.E. (Hilleke E.), Jalbrzikowski, M. (Maria), Karkashadze, G.A. (George A.), Klapwijk, E.T. (Eduard T.), Knickmeyer, R.C. (Rebecca C.), Kochunov, P. (Peter), Koerte, I.K. (Inga K.), Kong, X.-Z. (Xiang-Zhen), Liew, S.-L. (Sook-Lei), Lin, A.P. (Alexander P.), Logue, M.W. (Mark W.), Luders, E. (Eileen), Macciardi, F. (Fabio), Mackey, S. (Scott), Mayer, A.R. (Andrew R.), McDonald, C.R. (Carrie R.), McMahon, A.B. (Agnes B.), Medland, S.E. (Sarah), Modinos, G. (Gemma), Morey, R.A. (Rajendra A.), Mueller, S.C. (Sven C.), Mukherjee, P. (Pratik), Namazova-Baranova, L. (L.), Nir, T.M. (Talia M.), Olsen, A. (Alexander), Paschou, P. (Peristera), Pine, D.S. (Daniel S.), Pizzagalli, F. (Fabrizio), Rentería, M.E. (Miguel), Rohrer, J.D. (Jonathan D.), Sämann, P.G. (Philipp), Schmaal, L. (Lianne), Schumann, G. (Gunter), Shiroishi, M.S. (Mark S.), Sisodiya, S.M. (Sanjay), Smit, D.J.A. (Dirk J A), Sønderby, I.E. (Ida E.), Stein, D.J. (Dan J.), Stein, J.L., Tahmasian, M. (Masoud), Tate, D.F. (David F.), Turner, J. (Jessica), Heuvel, O.A. (Odile A.), Wee, N.J. (Nic) van der, van der Werf, Y.D. (Ysbrand), Erp, T.G.M. (Theo G.) van, van Haren, N.E.M. (Neeltje E M), van Rooij, D. (Daan), Van Velzen, L.S., Veer, I.M. (Ilya), Veltman, D.J. (Dick), Villalon-Reina, J.E. (Julio E.), Walter, H.J. (Henrik), Whelan, C.D. (Christopher), Wilde, E.A. (Elisabeth A.), Zarei, M. (Mojtaba), and Zelman, V. (Vladimir)

Abstract

This review summarizes the last decade of work by the ENIGMA (Enhancing NeuroImaging Genetics through Meta Analysis) Consortium, a global alliance of over 1400 scientists across 43 countries, studying the human brain in health and disease. Building on large-scale genetic studies that discovered the first robustly replicated genetic loci associated with brain metrics, ENIGMA has diversified into over 50 working groups (WGs), pooling worldwide data and expertise to answer fundamental questions in neuroscience, psychiatry, neurology, and genetics. Most ENIGMA WGs focus on specific psychiatric and neurological conditions, other WGs study normal variation due to sex and gender differences, or development and aging; still other WGs develop methodological pipelines and tools to facilitate harmonized analyses of "big data" (i.e., genetic and epigenetic data, multimodal MRI, and electroencephalography data). These international efforts have yielded the largest neuroimaging studies to date in schizophrenia, bipolar disorder, major depressive disorder, post-traumatic stress disorder, substance use disorders, obsessive-compulsive disorder, attention-deficit/hyperactivity disorder, autism spectrum disorders, epilepsy, and 22q11.2 deletion syndrome. More recent ENIGMA WGs have formed to study anxiety disorders, suicidal thoughts and behavior, sleep and insomnia, eating disorders, irritability, brain injury, antisocial personality and conduct disorder, and dissociative identity disorder. Here, we summarize the first decade of ENIGMA's activities and ongoing projects, and describe the successes and challenges encountered along the way. We highlight the advantages of collaborative large-scale coordinated data analyses for testing reproducibility and robustness of findings, offering the opportunity to identify brain systems involved in clinical syndromes across diverse samples and associated genetic, environmental, demographic, cognitive, and psychosocial factors.

Published
2020
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15. ENIGMA and global neuroscience: A decade of large-scale studies of the brain in health and disease across more than 40 countries

Author

Thompson, PM, Jahanshad, N, Ching, CRK, Salminen, LE, Thomopoulos, SI, Bright, J, Baune, BT, Bertolin, S, Bralten, J, Bruin, WB, Buelow, R, Chen, J, Chye, Y, Dannlowski, U, de Kovel, CGF, Donohoe, G, Eyler, LT, Faraone, SV, Favre, P, Filippi, CA, Frodl, T, Garijo, D, Gil, Y, Grabe, HJ, Grasby, KL, Hajek, T, Han, LKM, Hatton, SN, Hilbert, K, Ho, TC, Holleran, L, Homuth, G, Hosten, N, Houenou, J, Ivanov, I, Jia, T, Kelly, S, Klein, M, Kwon, JS, Laansma, MA, Leerssen, J, Lueken, U, Nunes, A, Neill, JO, Opel, N, Piras, F, Postema, MC, Pozzi, E, Shatokhina, N, Soriano-Mas, C, Spalletta, G, Sun, D, Teumer, A, Tilot, AK, Tozzi, L, van der Merwe, C, Van Someren, EJW, van Wingen, GA, Voelzke, H, Walton, E, Wang, L, Winkler, AM, Wittfeld, K, Wright, MJ, Yun, J-Y, Zhang, G, Zhang-James, Y, Adhikari, BM, Agartz, I, Aghajani, M, Aleman, A, Althoff, RR, Altmann, A, Andreassen, OA, Baron, DA, Bartnik-Olson, BL, Bas-Hoogendam, J, Baskin-Sommers, AR, Bearden, CE, Berner, LA, Boedhoe, PSW, Brouwer, RM, Buitelaar, JK, Caeyenberghs, K, Cecil, CAM, Cohen, RA, Cole, JH, Conrod, PJ, De Brito, SA, de Zwarte, SMC, Dennis, EL, Desrivieres, S, Dima, D, Ehrlich, S, Esopenko, C, Fairchild, G, Fisher, SE, Fouche, J-P, Francks, C, Frangou, S, Franke, B, Garavan, HP, Glahn, DC, Groenewold, NA, Gurholt, TP, Gutman, BA, Hahn, T, Harding, IH, Hernaus, D, Hibar, DP, Hillary, FG, Hoogman, M, Pol, HE, Jalbrzikowski, M, Karkashadze, GA, Klapwijk, ET, Knickmeyer, RC, Kochunov, P, Koerte, IK, Kong, X-Z, Liew, S-L, Lin, AP, Logue, MW, Luders, E, Macciardi, F, Mackey, S, Mayer, AR, McDonald, CR, McMahon, AB, Medland, SE, Modinos, G, Morey, RA, Mueller, SC, Mukherjee, P, Namazova-Baranova, L, Nir, TM, Olsen, A, Paschou, P, Pine, DS, Pizzagalli, F, Renteria, ME, Rohrer, JD, Saemann, PG, Schmaal, L, Schumann, G, Shiroishi, MS, Sisodiya, SM, Smit, DJA, Sonderby, IE, Stein, DJ, Stein, JL, Tahmasian, M, Tate, DF, Turner, JA, van den Heuvel, OA, van der Wee, NJA, van der Werf, YD, van Erp, TGM, van Haren, NEM, van Rooij, D, van Velzen, LS, Veer, IM, Veltman, DJ, Villalon-Reina, JE, Walter, H, Whelan, CD, Wilde, EA, Zarei, M, Zelman, V, Thompson, PM, Jahanshad, N, Ching, CRK, Salminen, LE, Thomopoulos, SI, Bright, J, Baune, BT, Bertolin, S, Bralten, J, Bruin, WB, Buelow, R, Chen, J, Chye, Y, Dannlowski, U, de Kovel, CGF, Donohoe, G, Eyler, LT, Faraone, SV, Favre, P, Filippi, CA, Frodl, T, Garijo, D, Gil, Y, Grabe, HJ, Grasby, KL, Hajek, T, Han, LKM, Hatton, SN, Hilbert, K, Ho, TC, Holleran, L, Homuth, G, Hosten, N, Houenou, J, Ivanov, I, Jia, T, Kelly, S, Klein, M, Kwon, JS, Laansma, MA, Leerssen, J, Lueken, U, Nunes, A, Neill, JO, Opel, N, Piras, F, Postema, MC, Pozzi, E, Shatokhina, N, Soriano-Mas, C, Spalletta, G, Sun, D, Teumer, A, Tilot, AK, Tozzi, L, van der Merwe, C, Van Someren, EJW, van Wingen, GA, Voelzke, H, Walton, E, Wang, L, Winkler, AM, Wittfeld, K, Wright, MJ, Yun, J-Y, Zhang, G, Zhang-James, Y, Adhikari, BM, Agartz, I, Aghajani, M, Aleman, A, Althoff, RR, Altmann, A, Andreassen, OA, Baron, DA, Bartnik-Olson, BL, Bas-Hoogendam, J, Baskin-Sommers, AR, Bearden, CE, Berner, LA, Boedhoe, PSW, Brouwer, RM, Buitelaar, JK, Caeyenberghs, K, Cecil, CAM, Cohen, RA, Cole, JH, Conrod, PJ, De Brito, SA, de Zwarte, SMC, Dennis, EL, Desrivieres, S, Dima, D, Ehrlich, S, Esopenko, C, Fairchild, G, Fisher, SE, Fouche, J-P, Francks, C, Frangou, S, Franke, B, Garavan, HP, Glahn, DC, Groenewold, NA, Gurholt, TP, Gutman, BA, Hahn, T, Harding, IH, Hernaus, D, Hibar, DP, Hillary, FG, Hoogman, M, Pol, HE, Jalbrzikowski, M, Karkashadze, GA, Klapwijk, ET, Knickmeyer, RC, Kochunov, P, Koerte, IK, Kong, X-Z, Liew, S-L, Lin, AP, Logue, MW, Luders, E, Macciardi, F, Mackey, S, Mayer, AR, McDonald, CR, McMahon, AB, Medland, SE, Modinos, G, Morey, RA, Mueller, SC, Mukherjee, P, Namazova-Baranova, L, Nir, TM, Olsen, A, Paschou, P, Pine, DS, Pizzagalli, F, Renteria, ME, Rohrer, JD, Saemann, PG, Schmaal, L, Schumann, G, Shiroishi, MS, Sisodiya, SM, Smit, DJA, Sonderby, IE, Stein, DJ, Stein, JL, Tahmasian, M, Tate, DF, Turner, JA, van den Heuvel, OA, van der Wee, NJA, van der Werf, YD, van Erp, TGM, van Haren, NEM, van Rooij, D, van Velzen, LS, Veer, IM, Veltman, DJ, Villalon-Reina, JE, Walter, H, Whelan, CD, Wilde, EA, Zarei, M, and Zelman, V

Abstract

This review summarizes the last decade of work by the ENIGMA (Enhancing NeuroImaging Genetics through Meta Analysis) Consortium, a global alliance of over 1400 scientists across 43 countries, studying the human brain in health and disease. Building on large-scale genetic studies that discovered the first robustly replicated genetic loci associated with brain metrics, ENIGMA has diversified into over 50 working groups (WGs), pooling worldwide data and expertise to answer fundamental questions in neuroscience, psychiatry, neurology, and genetics. Most ENIGMA WGs focus on specific psychiatric and neurological conditions, other WGs study normal variation due to sex and gender differences, or development and aging; still other WGs develop methodological pipelines and tools to facilitate harmonized analyses of "big data" (i.e., genetic and epigenetic data, multimodal MRI, and electroencephalography data). These international efforts have yielded the largest neuroimaging studies to date in schizophrenia, bipolar disorder, major depressive disorder, post-traumatic stress disorder, substance use disorders, obsessive-compulsive disorder, attention-deficit/hyperactivity disorder, autism spectrum disorders, epilepsy, and 22q11.2 deletion syndrome. More recent ENIGMA WGs have formed to study anxiety disorders, suicidal thoughts and behavior, sleep and insomnia, eating disorders, irritability, brain injury, antisocial personality and conduct disorder, and dissociative identity disorder. Here, we summarize the first decade of ENIGMA's activities and ongoing projects, and describe the successes and challenges encountered along the way. We highlight the advantages of collaborative large-scale coordinated data analyses for testing reproducibility and robustness of findings, offering the opportunity to identify brain systems involved in clinical syndromes across diverse samples and associated genetic, environmental, demographic, cognitive, and psychosocial factors.

Published
2020

16. Mapping Cortical and Subcortical Asymmetry in Obsessive-Compulsive Disorder: Findings From the ENIGMA Consortium

Author

Kong, X-Z, Boedhoe, PSW, Abe, Y, Alonso, P, Ameis, SH, Arnold, PD, Assogna, F, Baker, JT, Batistuzzo, MC, Benedetti, F, Beucke, JC, Bollettini, I, Bose, A, Brem, S, Brennan, BP, Buitelaar, J, Calvo, R, Cheng, Y, Cho, KIK, Dallaspezia, S, Denys, D, Ely, BA, Feusner, J, Fitzgerald, KD, Fouche, J-P, Fridgeirsson, EA, Glahn, DC, Gruner, P, Gursel, DA, Hauser, TU, Hirano, Y, Hoexter, MQ, Hu, H, Huyser, C, James, A, Jaspers-Fayer, F, Kathmann, N, Kaufmann, C, Koch, K, Kuno, M, Kvale, G, Kwon, JS, Lazaro, L, Liu, Y, Lochner, C, Marques, P, Marsh, R, Martinez-Zalacain, I, Mataix-Cols, D, Medland, SE, Menchon, JM, Minuzzi, L, Moreira, PS, Morer, A, Morgado, P, Nakagawa, A, Nakamae, T, Nakao, T, Narayanaswamy, JC, Nurmi, EL, O'Neill, J, Pariente, JC, Perriello, C, Piacentini, J, Piras, F, Pittenger, C, Reddy, YCJ, Rus-Oswald, OG, Sakai, Y, Sato, JR, Schmaal, L, Simpson, HB, Soreni, N, Soriano-Mas, C, Spalletta, G, Stern, ER, Stevens, MC, Stewart, SE, Szeszko, PR, Tolin, DF, Tsuchiyagaito, A, van Rooij, D, van Wingen, GA, Venkatasubramanian, G, Wang, Z, Yun, J-Y, Thompson, PM, Stein, DJ, van den Heuvel, OA, Francks, C, Kong, X-Z, Boedhoe, PSW, Abe, Y, Alonso, P, Ameis, SH, Arnold, PD, Assogna, F, Baker, JT, Batistuzzo, MC, Benedetti, F, Beucke, JC, Bollettini, I, Bose, A, Brem, S, Brennan, BP, Buitelaar, J, Calvo, R, Cheng, Y, Cho, KIK, Dallaspezia, S, Denys, D, Ely, BA, Feusner, J, Fitzgerald, KD, Fouche, J-P, Fridgeirsson, EA, Glahn, DC, Gruner, P, Gursel, DA, Hauser, TU, Hirano, Y, Hoexter, MQ, Hu, H, Huyser, C, James, A, Jaspers-Fayer, F, Kathmann, N, Kaufmann, C, Koch, K, Kuno, M, Kvale, G, Kwon, JS, Lazaro, L, Liu, Y, Lochner, C, Marques, P, Marsh, R, Martinez-Zalacain, I, Mataix-Cols, D, Medland, SE, Menchon, JM, Minuzzi, L, Moreira, PS, Morer, A, Morgado, P, Nakagawa, A, Nakamae, T, Nakao, T, Narayanaswamy, JC, Nurmi, EL, O'Neill, J, Pariente, JC, Perriello, C, Piacentini, J, Piras, F, Pittenger, C, Reddy, YCJ, Rus-Oswald, OG, Sakai, Y, Sato, JR, Schmaal, L, Simpson, HB, Soreni, N, Soriano-Mas, C, Spalletta, G, Stern, ER, Stevens, MC, Stewart, SE, Szeszko, PR, Tolin, DF, Tsuchiyagaito, A, van Rooij, D, van Wingen, GA, Venkatasubramanian, G, Wang, Z, Yun, J-Y, Thompson, PM, Stein, DJ, van den Heuvel, OA, and Francks, C

Abstract

BACKGROUND: Lateralized dysfunction has been suggested in obsessive-compulsive disorder (OCD). However, it is currently unclear whether OCD is characterized by abnormal patterns of brain structural asymmetry. Here we carried out what is by far the largest study of brain structural asymmetry in OCD. METHODS: We studied a collection of 16 pediatric datasets (501 patients with OCD and 439 healthy control subjects), as well as 30 adult datasets (1777 patients and 1654 control subjects) from the OCD Working Group within the ENIGMA (Enhancing Neuro Imaging Genetics through Meta Analysis) Consortium. Asymmetries of the volumes of subcortical structures, and of measures of regional cortical thickness and surface areas, were assessed based on T1-weighted magnetic resonance imaging scans, using harmonized image analysis and quality control protocols. We investigated possible alterations of brain asymmetry in patients with OCD. We also explored potential associations of asymmetry with specific aspects of the disorder and medication status. RESULTS: In the pediatric datasets, the largest case-control differences were observed for volume asymmetry of the thalamus (more leftward; Cohen's d = 0.19) and the pallidum (less leftward; d = -0.21). Additional analyses suggested putative links between these asymmetry patterns and medication status, OCD severity, or anxiety and depression comorbidities. No significant case-control differences were found in the adult datasets. CONCLUSIONS: The results suggest subtle changes of the average asymmetry of subcortical structures in pediatric OCD, which are not detectable in adults with the disorder. These findings may reflect altered neurodevelopmental processes in OCD.

Published
2020

22. Quantification of Natural CO2 Emission Through Faults and Fracture Zones in Coal Basins.

Author

Ma, Y., Kong, X.‐Z., Zhang, C., Scheuermann, A., Bringemeier, D., and Li, L.

Subjects
*COAL basins, *FAULT zones, *COALBED methane, *FUGITIVE emissions, *MINE closures, *GAS fields, *SOIL air
Abstract

With the presence of highly permeable pathways, such as faults and fractures zones, coal seam gases, particularly CO2, could potentially migrate upwardly from the coal deposits into the shallow subsurface and then to the atmosphere. This letter reports soil gas mapping and gamma ray survey in coal basin of Hunter River Valley, Australia. The survey facilitated the delineation of fault structures across the sampling regions, where the identified faults were confirmed by an independent drilling investigation later. Furthermore, to evaluate the gas emission fluxes from coalbeds through fault zones, the measured CO2 concentrations, coupled with an inverse modeling, enable the estimation of the width of the fault zone and associated CO2 emission flux in the range of 2 × 10−5–6 × 10−5 mol/m2/s at the study site. Our new approach provides a way to determine emissions of gases from deep formations, which may contribute considerably to the greenhouse gases cycles. Plain Language Summary: Australia is one of the world's biggest coal exporters. Total fugitive emissions in Australia have increased in line with the expanding coal and gas production sector. CO2 emissions may occur during the operation and following the closure of coal mines and coal seam gas fields. Leakage of gases to the atmosphere may be induced through fractured gas‐bearing strata and open vents. Hence, the emissions of CO2 from coal basins should be counted toward the overall emissions budget. The new approach proposed by the current study can be applied to estimate emissions of CO2 from fracture and fault zones, which have not been well quantified and yet can be potentially an important source of greenhouse gases contributing to the overall budget at a global scale. So this work could provide a better track progress on international emission commitments. Key Points: Field assessments on gas emission fluxes from coal basin at fault zones in the Hunter River Valley, AustraliaSoil gas mapping and gamma ray survey delineated several fault structures across the sampling transects, which were later confirmed by an independent borehole drilling investigationAn inverse modeling is applied to determine the width of the fault zone and its CO2 emission flux at the study site [ABSTRACT FROM AUTHOR]

Published
2021
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23. The Bayes factor and its implementation in JASP: A practical primer

Author

Hu, C.-P. (Chuan-Peng), Kong, X.-Z. (Xiang-Zhen), Wagenmakers, E.-J. (Eric-Jan), Ly, A. (Alexander), Peng, K. (Kaiping), Hu, C.-P. (Chuan-Peng), Kong, X.-Z. (Xiang-Zhen), Wagenmakers, E.-J. (Eric-Jan), Ly, A. (Alexander), and Peng, K. (Kaiping)

Abstract

Statistical inference plays a critical role in modern scientific research, however, the dominant method for statistical inference in science, null hypothesis significance testing (NHST), is often misunderstood and misused, which leads to unreproducible findings. To address this issue, researchers propose to adopt the Bayes factor as an alternative to NHST. The Bayes factor is a principled Bayesian tool for model selection and hypothesis testing, and can be interpreted as the strength for both the null hypothesis H0 and the alternative hypothesis H1 based on the current data. Compared to NHST, the Bayes factor has the following advantages: it quantifies the evidence that the data provide for both the H0 and the H1, it is not “violently biased” against H0, it allows one to monitor the evidence as the data accumulate, and it does not depend on sampling plans. Importantly, the recently developed open software JASP makes the calculation of Bayes factor accessible for most researchers in psychology, as we demonstrated for the t-test. Given these advantages, adopting the Bayes factor will improve psychological researchers’ statistical inferences. Nevertheless, to make the analysis more reproducible, researchers should keep their data analysis transparent and open.

Published
2018

34. Refined Semilattice Structure of Regular Orthocryptogroups.

Author

Kong, X. Z., Yuan, Z. L., and Jia, G. J.

Subjects
*SEMIGROUPS (Algebra), *GROUP theory, *SEMILATTICES, *LATTICE theory, *MATHEMATICS
Abstract

The famous result of Rilly and Petrich on cryptogroups is generalized. We show that a completely regular semigroup is a regular orthocryptogroup if and only if it is a refined semilattice of rectangular groups. Thus the results recently obtained by Kong and Shum on regular cryptogroups are enriched and strengthened. [ABSTRACT FROM AUTHOR]

Published
2005

35. Quantification of Natural CO2Emission Through Faults and Fracture Zones in Coal Basins

Author

Ma, Y., Kong, X.‐Z., Zhang, C., Scheuermann, A., Bringemeier, D., and Li, L.

Abstract

With the presence of highly permeable pathways, such as faults and fractures zones, coal seam gases, particularly CO2, could potentially migrate upwardly from the coal deposits into the shallow subsurface and then to the atmosphere. This letter reports soil gas mapping and gamma ray survey in coal basin of Hunter River Valley, Australia. The survey facilitated the delineation of fault structures across the sampling regions, where the identified faults were confirmed by an independent drilling investigation later. Furthermore, to evaluate the gas emission fluxes from coalbeds through fault zones, the measured CO2concentrations, coupled with an inverse modeling, enable the estimation of the width of the fault zone and associated CO2emission flux in the range of 2 × 10−5–6 × 10−5mol/m2/s at the study site. Our new approach provides a way to determine emissions of gases from deep formations, which may contribute considerably to the greenhouse gases cycles. Australia is one of the world's biggest coal exporters. Total fugitive emissions in Australia have increased in line with the expanding coal and gas production sector. CO2emissions may occur during the operation and following the closure of coal mines and coal seam gas fields. Leakage of gases to the atmosphere may be induced through fractured gas‐bearing strata and open vents. Hence, the emissions of CO2from coal basins should be counted toward the overall emissions budget. The new approach proposed by the current study can be applied to estimate emissions of CO2from fracture and fault zones, which have not been well quantified and yet can be potentially an important source of greenhouse gases contributing to the overall budget at a global scale. So this work could provide a better track progress on international emission commitments. Field assessments on gas emission fluxes from coal basin at fault zones in the Hunter River Valley, AustraliaSoil gas mapping and gamma ray survey delineated several fault structures across the sampling transects, which were later confirmed by an independent borehole drilling investigationAn inverse modeling is applied to determine the width of the fault zone and its CO2emission flux at the study site Field assessments on gas emission fluxes from coal basin at fault zones in the Hunter River Valley, Australia Soil gas mapping and gamma ray survey delineated several fault structures across the sampling transects, which were later confirmed by an independent borehole drilling investigation An inverse modeling is applied to determine the width of the fault zone and its CO2emission flux at the study site

Published
2021
Full Text
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37. Mapping Cortical and Subcortical Asymmetry in Obsessive-Compulsive Disorder: Findings From the ENIGMA Consortium

Author

Xiang-Zhen Kong, Premika S.W. Boedhoe, Yoshinari Abe, Pino Alonso, Stephanie H. Ameis, Paul D. Arnold, Francesca Assogna, Justin T. Baker, Marcelo C. Batistuzzo, Francesco Benedetti, Jan C. Beucke, Irene Bollettini, Anushree Bose, Silvia Brem, Brian P. Brennan, Jan Buitelaar, Rosa Calvo, Yuqi Cheng, Kang Ik K. Cho, Sara Dallaspezia, Damiaan Denys, Benjamin A. Ely, Jamie Feusner, Kate D. Fitzgerald, Jean-Paul Fouche, Egill A. Fridgeirsson, David C. Glahn, Patricia Gruner, Deniz A. Gürsel, Tobias U. Hauser, Yoshiyuki Hirano, Marcelo Q. Hoexter, Hao Hu, Chaim Huyser, Anthony James, Fern Jaspers-Fayer, Norbert Kathmann, Christian Kaufmann, Kathrin Koch, Masaru Kuno, Gerd Kvale, Jun Soo Kwon, Luisa Lazaro, Yanni Liu, Christine Lochner, Paulo Marques, Rachel Marsh, Ignacio Martínez-Zalacaín, David Mataix-Cols, Sarah E. Medland, José M. Menchón, Luciano Minuzzi, Pedro S. Moreira, Astrid Morer, Pedro Morgado, Akiko Nakagawa, Takashi Nakamae, Tomohiro Nakao, Janardhanan C. Narayanaswamy, Erika L. Nurmi, Joseph O'Neill, Jose C. Pariente, Chris Perriello, John Piacentini, Fabrizio Piras, Federica Piras, Christopher Pittenger, Y.C. Janardhan Reddy, Oana Georgiana Rus-Oswald, Yuki Sakai, Joao R. Sato, Lianne Schmaal, H. Blair Simpson, Noam Soreni, Carles Soriano-Mas, Gianfranco Spalletta, Emily R. Stern, Michael C. Stevens, S. Evelyn Stewart, Philip R. Szeszko, David F. Tolin, Aki Tsuchiyagaito, Daan van Rooij, Guido A. van Wingen, Ganesan Venkatasubramanian, Zhen Wang, Je-Yeon Yun, Paul M. Thompson, Dan J. Stein, Odile A. van den Heuvel, Clyde Francks, Alan Anticevic, Nerisa Banaj, Nuria Bargalló, Daniel Brandeis, Geraldo F. Busatto, Anna Calvo, Valentina Ciullo, Froukje E. de Vries, Stella J. de Wit, Erin Dickie, Renate Drechsler, Madalena Esteves, Andrea Falini, Yu Fang, Martijn Figee, Martine Fontaine, Geoff Hall, Sayo Hamatani, Gregory L. Hanna, Bjarne Hansen, Keisuke Ikari, Neda Jahanshad, Ricardo Magalhães, Yasutaka Masuda, Koji Matsumoto, James T. McCracken, Euripedes C. Miguel, Jin Narumoto, Seiji Nishida, Sara Poletti, Tim Reess, Eiji Shimizu, Nuno Sousa, Jumpei Takahashi, Jinsong Tang, Anders Lillevik Thorsen, Ysbrand D. van der Werf, Dick J. Veltman, Daniela Vecchio, Susanne Walitza, Anri Watanabe, Jian Xu, Xiufeng Xu, Kei Yamada, Tokiko Yoshida, Mojtaba Zarei, Qing Zhao, Cong Zhou, ENIGMA-OCD Working Group, Adult Psychiatry, ANS - Compulsivity, Impulsivity & Attention, Graduate School, Child Psychiatry, Kong, X. -Z., Boedhoe, P. S. W., Abe, Y., Alonso, P., Ameis, S. H., Arnold, P. D., Assogna, F., Baker, J. T., Batistuzzo, M. C., Benedetti, F., Beucke, J. C., Bollettini, I., Bose, A., Brem, S., Brennan, B. P., Buitelaar, J., Calvo, R., Cheng, Y., Cho, K. I. K., Dallaspezia, S., Denys, D., Ely, B. A., Feusner, J., Fitzgerald, K. D., Fouche, J. -P., Fridgeirsson, E. A., Glahn, D. C., Gruner, P., Gursel, D. A., Hauser, T. U., Hirano, Y., Hoexter, M. Q., Hu, H., Huyser, C., James, A., Jaspers-Fayer, F., Kathmann, N., Kaufmann, C., Koch, K., Kuno, M., Kvale, G., Kwon, J. S., Lazaro, L., Liu, Y., Lochner, C., Marques, P., Marsh, R., Martinez-Zalacain, I., Mataix-Cols, D., Medland, S. E., Menchon, J. M., Minuzzi, L., Moreira, P. S., Morer, A., Morgado, P., Nakagawa, A., Nakamae, T., Nakao, T., Narayanaswamy, J. C., Nurmi, E. L., O'Neill, J., Pariente, J. C., Perriello, C., Piacentini, J., Piras, F., Pittenger, C., Reddy, Y. C. J., Rus-Oswald, O. G., Sakai, Y., Sato, J. R., Schmaal, L., Simpson, H. B., Soreni, N., Soriano-Mas, C., Spalletta, G., Stern, E. R., Stevens, M. C., Stewart, S. E., Szeszko, P. R., Tolin, D. F., Tsuchiyagaito, A., van Rooij, D., van Wingen, G. A., Venkatasubramanian, G., Wang, Z., Yun, J. -Y., Anticevic, A., Banaj, N., Bargallo, N., Brandeis, D., Busatto, G. F., Calvo, A., Ciullo, V., de Vries, F. E., de Wit, S. J., Dickie, E., Drechsler, R., Esteves, M., Falini, A., Fang, Y., Figee, M., Fontaine, M., Hall, G., Hamatani, S., Hanna, G. L., Hansen, B., Ikari, K., Jahanshad, N., Magalhaes, R., Masuda, Y., Matsumoto, K., Mccracken, J. T., Miguel, E. C., Narumoto, J., Nishida, S., Poletti, S., Reess, T., Shimizu, E., Sousa, N., Takahashi, J., Tang, J., Thorsen, A. L., van der Werf, Y. D., Veltman, D. J., Vecchio, D., Walitza, S., Watanabe, A., Xu, J., Xu, X., Yamada, K., Yoshida, T., Zarei, M., Zhao, Q., Zhou, C., Thompson, P. M., Stein, D. J., van den Heuvel, O. A., Francks, C., Netherlands Institute for Neuroscience (NIN), Universidade do Minho, Anatomy and neurosciences, Amsterdam Neuroscience - Compulsivity, Impulsivity & Attention, and Psychiatry

Subjects
0301 basic medicine, Adult, medicine.medical_specialty, Obsessive-Compulsive Disorder, Mega-analysis, Mega-analysi, media_common.quotation_subject, Thalamus, Medicina Básica [Ciências Médicas], Audiology, Asymmetry, behavioral disciplines and activities, 03 medical and health sciences, 0302 clinical medicine, Neuroimaging, mental disorders, medicine, Image Processing, Computer-Assisted, Obsessive-compulsive disorder, Brain asymmetry, Humans, Child, Biological Psychiatry, Depression (differential diagnoses), media_common, Brain Mapping, Science & Technology, medicine.diagnostic_test, business.industry, Laterality, Neurosi obsessiva, Brain, Magnetic resonance imaging, Cerebral cortex, Magnetic Resonance Imaging, humanities, Escorça cerebral, 030104 developmental biology, Meta-analysis, Ciências Médicas::Medicina Básica, Pallidum, Anxiety, medicine.symptom, business, 030217 neurology & neurosurgery
Abstract

Accepted Manuscript, BACKGROUND: Lateralized dysfunction has been suggested in obsessive-compulsive disorder (OCD). However, it is currently unclear whether OCD is characterized by abnormal patterns of brain structural asymmetry. Here we carried out what is by far the largest study of brain structural asymmetry in OCD.METHODS: We studied a collection of 16 pediatric datasets (501 patients with OCD and 439 healthy control subjects), as well as 30 adult datasets (1777 patients and 1654 control subjects) from the OCD Working Group within the ENIGMA (Enhancing Neuro Imaging Genetics through Meta Analysis) Consortium. Asymmetries of the volumes of subcortical structures, and of measures of regional cortical thickness and surface areas, were assessed based on T1-weighted magnetic resonance imaging scans, using harmonized image analysis and quality control protocols. We investigated possible alterations of brain asymmetry in patients with OCD. We also explored potential associations of asymmetry with specific aspects of the disorder and medication status.RESULTS: In the pediatric datasets, the largest case-control differences were observed for volume asymmetry of the thalamus (more leftward; Cohen's d = 0.19) and the pallidum (less leftward; d = -20.21). Additional analyses suggested putative links between these asymmetry patterns and medication status, OCD severity, or anxiety and depression comorbidities. No significant case-control differences were found in the adult datasets.CONCLUSIONS: The results suggest subtle changes of the average asymmetry of subcortical structures in pediatric OCD, which are not detectable in adults with the disorder. These findings may reflect altered neurodevelopmental processes in OCD., This research was funded by the Max Planck Society (Germany). Additional funding was from the Japan Society for the Promotion of Science (KAKENHI Grant No. 18K15523 [to YA], KAKENHI Grant No. 16K04344 [to YH], KAKENHI Grant Nos. 16K19778 and 18K07608 [to TNakam], and KAKENHI Grant No. 26461762 [to AN]); the Carlos III Health Institute (Grant No. PI14/00419 [to PA], Grant No. PI040829 cofunded by European Regional Development Fund [to LL], Grant No. FI17/00294 [to IM-Z], Grant No. PI16/00950 [to JMM], and Grant Nos. CPII16/00048, PI13/01958, and PI16/00889 cofunded by European Regional Development Funds [to CS-M]); the Ontario Mental Health Foundation (Research Training Fellowship [to SHA]); Alberta Innovates Translational Health Chair in Child and Youth Mental Health (to PDA), the Ontario Brain Institute (to PDA); the National Institute of Mental Health (Grant No. K23MH104515 [to JTB], Grant No. K23-MH092397 [to BPB], Grant No. K23MH082176 [to KDF), Grant No. R21MH101441 [to RM], Grant No. R01MH081864 [to JO and JP], and Grant No. R01MH085900 [to JO and JF], Grant No. R21MH093889 [to HBS]); Fundação de Amparo à Pesquisa do Estado de São Paulo (Grant No. 2011/21357–9 [to MCB], Grant No. 2011/21357–9 [to GFB], Grant No. 2011/21357–9 [to MQH], and Grant No. 2011/21357–9 [to ECM]); the Swiss National Science Foundation (Grant No. 320030_130237 [to SB; principal investigator, Susanne Walitza]); the Hartmann Müller Foundation (Grant No. 1460 [to SB]); the David Judah Fund at the Massachusetts General Hospital (to BPB); EU FP7 Project TACTICS (Grant No. 278948 [to JB]); the National Natural Science Foundation of China (Grant No. 81560233 [to YC] and Grant No. 81371340 [to ZW]); the International OCD Foundation (Grant No. K23 MH115206 [to PG]); the Wellcome Sir Henry Dale Fellowship (Grant No. 211155/Z/18/Z [to TUH]); the Jacobs Foundation (to TUH); the Brain and Behavior Research Foundation (2018 NARSAD Young Investigator Grant No. 27023 [to TUH]); the Agency for Medical Research and Development (Grant No. JP18dm0307002 [to YH]); the Michael Smith Foundation for Health Research (to FJ-F); the Federal Ministry of Education and Research of Germany (Grant No. BMBF-01GW0724 [to NK]); the Deutsche Forschungsgemeinschaft (Grant No. KO 3744/7–1 [to KK]); the Helse Vest Health Authority (Grant Nos. 911754 and 911880 [to GK]); the Norwegian Research Council (Grant No. HELSEFORSK 243675 [to GK]); the Marató TV3 Foundation (Grant Nos. 01/2010 and 091710 [to LL]); the Agency for Management of University and Research Grants (Grant No. 2017 SGR 881 [to LL] and 2017 SGR 1247 from the Generalitat de Catalunya [to JMM]); Fundação para a Ciência e a Tecnologia (Grant No. PDE/BDE/113604/2015 from the PhD-iHES Program [to RM], Grant No. PDE/BDE/113601/2015 from the PhD-iHES Program [to PSM]); the Japanese Ministry of Education, Culture, Sports, Science and Technology (Grant-in-Aid for Scientific Research (Grant Nos. 22591262, 25461732, and 16K10253 [to TNakao]); the Government of India Department of Science and Technology (DST INSPIRE Faculty Grant No. -IFA12-LSBM-26 [to JCN] and Grant No. SR/S0/HS/0016/2011 [to YCJR]); the Government of India Department of Biotechnology (Grant No. BT/06/IYBA/2012 [to JCN] and Grant No. BT/PR13334/Med/30/259/2009 [to YCJR]); the New York State Office of Mental Health (to HBS); the Italian Ministry of Health (Grant No. RC13-14-15-16A [to GS]); the National Center for Advancing Translational Sciences (Grant No. UL1TR000067/KL2TR00069 [to ERS]); the Canadian Institutes of Health Research (to SES); the Michael Smith Foundation for Health Research (to SES); the British Columbia Provincial Health Services Authority (to SES); the Netherlands Organization for Scientific Research (Grant No. NWO/ZonMW Vidi 917.15.318 [to GAvW]); the Wellcome-DBT India Alliance (Grant No. 500236/Z/11/Z [to GV]); the Shanghai Key Laboratory of Psychotic Disorders (Grant No. 13dz2260500 [to ZW]).

Published
2020
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38. An overview of the first 5 years of the ENIGMA obsessive-compulsive disorder working group: The power of worldwide collaboration

Author

Edna Grünblatt, Noam Soreni, Takashi Nakamae, Susanne Walitza, Anthony A. James, Paul D. Arnold, Iliyan Ivanov, Patricia Gruner, Janardhanan C. Narayanaswamy, Dick J. Veltman, Gianfranco Spalletta, Sara Bertolín, H. Blair Simpson, Tomohiro Nakao, Je-Yeon Yun, David Mataix-Cols, Gerd Kvale, Carles Soriano-Mas, Guido van Wingen, Ganesan Venkatasubramanian, Luisa Lázaro, Francesco Benedetti, Chris Vriend, Xiangzhen Kong, Jan C. Beucke, Kate D. Fitzgerald, Martine Hoogman, Y. C.Janardhan Reddy, Kathrin Koch, Daan van Rooij, Jun Soo Kwon, David F. Tolin, Rachel Marsh, Jan K. Buitelaar, Neda Jahanshad, Christopher Pittenger, Stephan F. Taylor, Tomáš Paus, Willem B Bruin, Clyde Francks, Anushree Bose, Chaim Huyser, Christine Lochner, Erika L. Nurmi, Dan J. Stein, Joseph O'Neill, S. Evelyn Stewart, Yash Patel, João Ricardo Sato, Zhen Wang, Irene Bollettini, Lianne Schmaal, Alessandro S. De Nadai, Fabrizio Piras, Yoshiyuki Hirano, Brian P. Brennan, Odile A. van den Heuvel, Pedro Morgado, Sophia I. Thomopoulos, Marcelo Q. Hoexter, Premika S.W. Boedhoe, Paul M. Thompson, van den Heuvel, O. A., Boedhoe, P. S. W., Bertolin, S., Bruin, W. B., Francks, C., Ivanov, I., Jahanshad, N., Kong, X. -Z., Kwon, J. S., O'Neill, J., Paus, T., Patel, Y., Piras, F., Schmaal, L., Soriano-Mas, C., Spalletta, G., van Wingen, G. A., Yun, J. -Y., Vriend, C., Simpson, H. B., van Rooij, D., Hoexter, M. Q., Hoogman, M., Buitelaar, J. K., Arnold, P., Beucke, J. C., Benedetti, F., Bollettini, I., Bose, A., Brennan, B. P., De Nadai, A. S., Fitzgerald, K., Gruner, P., Grunblatt, E., Hirano, Y., Huyser, C., James, A., Koch, K., Kvale, G., Lazaro, L., Lochner, C., Marsh, R., Mataix-Cols, D., Morgado, P., Nakamae, T., Nakao, T., Narayanaswamy, J. C., Nurmi, E., Pittenger, C., Reddy, Y. C. J., Sato, J. R., Soreni, N., Stewart, S. E., Taylor, S. F., Tolin, D., Thomopoulos, S. I., Veltman, D. J., Venkatasubramanian, G., Walitza, S., Wang, Z., Thompson, P. M., and Stein, D. J.

Subjects
mega-analysis, Obsessive-Compulsive Disorder, Review Article, Machine Learning, 0302 clinical medicine, Neurobiology, Obsessive-compulsive disorder, Multicenter Studies as Topic, Disease process, Cervell, Review Articles, Pediatric, Psychiatry, Cerebral Cortex, Collaborative community, Radiological and Ultrasound Technology, 05 social sciences, ENIGMA, Brain, Experimental Psychology, Serious Mental Illness, humanities, 3. Good health, Mental Health, Neurology, Meta-analysis, Neurological, Cognitive Sciences, Mega analysis, Anatomy, Psychology, Neurobiologia, Clinical psychology, MRI, ENIGMA-OCD working group, Neuroimaging, behavioral disciplines and activities, 050105 experimental psychology, Lateralization of brain function, Power (social and political), 03 medical and health sciences, obsessive–compulsive disorder, Obsessive compulsive, Clinical Research, mental disorders, Humans, 0501 psychology and cognitive sciences, Radiology, Nuclear Medicine and imaging, Psiquiatria, mega‐analysis, volume, Neurosi obsessiva, Neurosciences, surface area, cortical thickness, Brain Disorders, meta-analysis, meta‐analysis, Neurology (clinical), 030217 neurology & neurosurgery
Abstract

Neuroimaging has played an important part in advancing our understanding of the neurobiology of obsessive?compulsive disorder (OCD). At the same time, neuroimaging studies of OCD have had notable limitations, including reliance on relatively small samples. International collaborative efforts to increase statistical power by combining samples from across sites have been bolstered by the ENIGMA consortium; this provides specific technical expertise for conducting multi-site analyses, as well as access to a collaborative community of neuroimaging scientists. In this article, we outline the background to, development of, and initial findings from ENIGMA's OCD working group, which currently consists of 47 samples from 34 institutes in 15 countries on 5 continents, with a total sample of 2,323 OCD patients and 2,325 healthy controls. Initial work has focused on studies of cortical thickness and subcortical volumes, structural connectivity, and brain lateralization in children, adolescents and adults with OCD, also including the study on the commonalities and distinctions across different neurodevelopment disorders. Additional work is ongoing, employing machine learning techniques. Findings to date have contributed to the development of neurobiological models of OCD, have provided an important model of global scientific collaboration, and have had a number of clinical implications. Importantly, our work has shed new light on questions about whether structural and functional alterations found in OCD reflect neurodevelopmental changes, effects of the disease process, or medication impacts. We conclude with a summary of ongoing work by ENIGMA-OCD, and a consideration of future directions for neuroimaging research on OCD within and beyond ENIGMA.

Published
2020
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