1. Development and Translation of PEDOT:PSS Microelectrodes for Intraoperative Monitoring
- Author
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George G. Malliaras, Vikash Gilja, Milan Halgren, Atsunori Tanaka, Erik Kaestner, Bob S. Carter, Sydney S. Cash, Garth Rees Cosgrove, John Hermiz, Jospeh Snider, Nicholas Rogers, Ilke Uguz, Shadi A. Dayeh, Mehran Ganji, Daniel R. Cleary, Sang Heon Lee, David Barba, and Eric Halgren
- Subjects
Materials science ,Nanotechnology ,02 engineering and technology ,Neurophysiology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials ,Neural modulation ,Biomaterials ,03 medical and health sciences ,Microelectrode ,Neural activity ,Engineering ,0302 clinical medicine ,Physical Barrier ,PEDOT:PSS ,Electrode ,Electrochemistry ,0210 nano-technology ,030217 neurology & neurosurgery - Abstract
Recording neural activity during neurosurgical interventions is an invaluable tool for both improving patient outcomes and advancing our understanding of neural mechanisms and organization. However, increasing clinical electrodes' signal-to-noise and spatial specificity requires overcoming substantial physical barriers due to the compromised metal electrochemical interface properties. The electrochemical properties of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) based interfaces surpass those of current clinical electrocorticography electrodes. Here, robust fabrication process of PEDOT:PSS microelectrode arrays is demonstrated for safe and high fidelity intraoperative monitoring of human brain. PEDOT:PSS microelectrodes measure significant differential neural modulation under various clinically relevant conditions. This study reports the first evoked (stimulus-locked) cognitive activity with changes in amplitude across pial surface distances as small as 400 µm, potentially enabling basic neurophysiology studies at the scale of neural micro-circuitry.
- Published
- 2017
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