The relationship of γ oscillations and face-specific ERPs recorded subdurally from occipitotemporal cortex.

ABSTRACT: The perception of faces evokes characteristic electrophysiological responses at discrete loci in human fusiform gyrus and adjacent ventral occipitotemporal cortical sites. Prominent among these responses are a surface-negative potential at ∼200-ms postonset (face-N200) and face-induced spectral perturbations in the gamma band (face-γERSP). The degree to which these responses represent activity in the same cortical loci and the degree to which they are influenced by the same perceptual and task variables are unknown. We evaluated this anatomical colocalization and functional correlation in 2 experiments in which the electrocorticogram was recorded from subdural electrodes in 51 participants. Experiment 1 investigated the category specificity of the γERSP and its colocalization with the face

SUBMITTER: Engell AD 

PROVIDER: S-EPMC3077434 | biostudies-literature | 2011 May

REPOSITORIES: biostudies-literature