Human posterior parietal cortex responds to visual stimuli as early as peristriate occipital cortex.

ABSTRACT: Much of what is known about the timing of visual processing in the brain is inferred from intracranial studies in monkeys, with human data limited to mainly noninvasive methods with lower spatial resolution. Here, we estimated visual onset latencies from electrocorticographic (ECoG) recordings in a patient who was implanted with 112 subdural electrodes, distributed across the posterior cortex of the right hemisphere, for presurgical evaluation of intractable epilepsy. Functional MRI prior to surgery was used to determine boundaries of visual areas. The patient was presented with images of objects from several categories. Event-related potentials (ERPs) were calculated across all categories excluding targets, and statistically reliable onset latencies were determined, using a bootstrapping

SUBMITTER: Regev TI 

PROVIDER: S-EPMC6482330 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature