Nat Neurosci. 2002 Sep;5(9):910-6 doi: 10.1038/nn909. 2002 Aug 27.

Stages of processing in face perception: an MEG study

Liu J, Harris A, Kanwisher N.

Abstract

Here we used magnetoencephalography (MEG) to investigate stages of processing in face perception in humans. We found a face-selective MEG response occurring only 100 ms after stimulus onset (the 'M100'), 70 ms earlier than previously reported. Further, the amplitude of this M100 response was correlated with successful categorization of stimuli as faces, but not with successful recognition of individual faces, whereas the previously-described face-selective 'M170' response was correlated with both processes. These data suggest that face processing proceeds through two stages: an initial stage of face categorization, and a later stage at which the identity of the individual face is extracted.

PMID: 12195430