Four-dimensional map of the human early visual system.

ABSTRACT: OBJECTIVE:We generated a large-scale, four-dimensional map of neuronal modulations elicited by full-field flash stimulation. METHODS:We analyzed electrocorticography (ECoG) recordings from 63 patients with focal epilepsy, and delineated the spatial-temporal dynamics of visually-elicited high-gamma70-110 Hz amplitudes on a standard brain template. We then clarified the neuronal events underlying visual evoked potential (VEP) components, by correlating with high-gamma amplitude measures. RESULTS:The medial-occipital cortex initially revealed rapid neural activation followed by prolonged suppression, reflected by augmentation of high-gamma activity lasting up to 100 ms followed by attenuation lasting up to 1000 ms, respectively. With a number of covariate factors incorporated into a predictio

SUBMITTER: Nakai Y 

PROVIDER: S-EPMC5743586 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature