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9. Biogenetic Temperament and Character and Attention Deficit Hyperactivity Disorder in Korean Children

Author

Yoo, Hee Jeong HJY, Kim, Minjeong MK, Ha, Jee Hyun JHH, Chung, Ain AC, Sim, Minyoung E. MES, Kim, Seog Ju SJK, and Lyoo, In Kyoon IKL

Abstract

AbstractBackground: The objective of this study was to evaluate the relationship between symptoms of attention deficit hyperactivity disorder (ADHD) and biogenetic temperament, as assessed by the Junior Temperament and Character Inventory (JTCI) in Korean elementary school children. Sampling and Methods: Five hundred and sixteen elementary school students (254 boys and 262 girls; age range 9–14 years, mean age 11.0 ± 1.0 years) were studied. The Junior Temperament and Character Inventory, both the self-rating and parent rating scales, the DuPaul ADHD rating scale (ARS-IV) for parents and teachers and the Child Behavior Checklist have been completed by study subjects. Children with high ARS-IV scores (the upper 10th percentile, n = 52) were defined to have ADHD. Fifty-two age- and sex-matched non-ADHD control subjects were selected randomly from a pool of 464 subjects. Results: Inattention and hyperactivity/impulsivity symptoms correlated positively with Novelty Seeking in both children and parent ratings. These symptoms correlated negatively with Persistence, Self-Directedness and Cooperativeness. Novelty Seeking also had significant correlations with attention problems, delinquent behavior, aggressive behavior, externalizing problems and social problems in the Child Behavior Checklist. The ADHD group (n = 52) had higher scores of Novelty Seeking and lower scores of Self-Directedness and Cooperativeness, compared with the control group. Conclusions: There were significant correlations between ADHD symptoms and Novelty Seeking. Current findings suggest that Novelty Seeking and ADHD share biogenetic backgrounds.Copyright © 2006 S. Karger AG, Basel

Published
2006

10. Decreased frontal white-matter integrity in abstinent methamphetamine abusers.

Author

Chung A, Lyoo IK, Kim SJ, Hwang J, Bae SC, Sung YH, Sim ME, Song IC, Kim J, Chang KH, and Renshaw PF

Subjects
Adult, Amphetamine-Related Disorders psychology, Anisotropy, Diffusion Magnetic Resonance Imaging, Female, Humans, Image Processing, Computer-Assisted, Male, Neuropsychological Tests, Psychiatric Status Rating Scales, Sex Characteristics, Substance Abuse Detection, Amphetamine-Related Disorders pathology, Methamphetamine, Prefrontal Cortex pathology
Abstract

This study explored differences in frontal white-matter (WM) integrity between methamphetamine (MA) abusers and healthy comparison subjects using diffusion tensor imaging (DTI). Fractional anisotropy (FA) values, which indicate WM integrity, were calculated for regions-of-interest in frontal WM on diffusion tensor images of 32 MA abusers and 30 healthy comparison subjects. Frontal executive functions were also assessed by the Wisconsin Card Sorting test (WCST). MA abusers had significantly lower FA values in bilateral frontal WM at the anterior commissure-posterior commissure (AC-PC) plane and the right frontal WM 5 mm above the AC-PC plane relative to healthy comparison subjects. MA abusers had more total, perseveration and non-perseveration errors in the WCST relative to healthy comparison subjects. FA values of the right frontal WM 5 mm above the AC-PC plane negatively correlated with the number of total and non-perseveration errors in the WCST in MA abusers. In the sub-analysis for gender differences, lower FA values in frontal WM and more errors in the WCST were found only in male MA abusers, not in female MA abusers, relative to comparison subjects of the respective gender. We report that frontal WM integrity of MA abusers is compromised. This finding may also be related to impairment in frontal executive function. In addition, the neurotoxic effect of MA on frontal WM may be less prominent in women than in men, possibly due to oestrogen's neuroprotective effect.

Published
2007
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