Electrocorticography (ECoG) electrode arrays for epidural implantation allow establishing neural interfaces, which promote investigation of complex distributed brain functions and development of neuroprosthetic systems while having reduced invasiveness in comparison to intracortical or subdural electrode placement. In this paper, we present the design, fabrication, and bothin-vitroandin-vivoevaluation of a flexible ECoG array with 202 closely spaced electrodes of 560-μ mdiameter, each coated with the polymer poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT: PSS) for chronic recording in two visual cortical areas V1 and V4 of macaque monkeys. The specific layout of the array provides a close fit to the curved surface of the brain. We confirm its chronic recording functionalityin-vivoby estimating visual receptive fields for the individual electrodes.
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Schander et al. (2018) studied this question.
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