To perceive or not perceive: the role of gamma-band activity in signaling object percepts.

ABSTRACT: The relation of gamma-band synchrony to holistic perception in which concerns the effects of sensory processing, high level perceptual gestalt formation, motor planning and response is still controversial. To provide a more direct link to emergent perceptual states we have used holistic EEG/ERP paradigms where the moment of perceptual "discovery" of a global pattern was variable. Using a rapid visual presentation of short-lived Mooney objects we found an increase of gamma-band activity locked to perceptual events. Additional experiments using dynamic Mooney stimuli showed that gamma activity increases well before the report of an emergent holistic percept. To confirm these findings in a data driven manner we have further used a support vector machine classification approach to distinguish

SUBMITTER: Castelhano J 

PROVIDER: S-EPMC3681966 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature