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Early face processing specificity: it's in the eyes!

Authors
  • Itier, Roxane J
  • Alain, Claude
  • Sedore, Katherine
  • McIntosh, Anthony R
Type
Published Article
Journal
Journal of cognitive neuroscience
Publication Date
Nov 01, 2007
Volume
19
Issue
11
Pages
1815–1826
Identifiers
PMID: 17958484
Source
Medline
License
Unknown

Abstract

Unlike most other objects that are processed analytically, faces are processed configurally. This configural processing is reflected early in visual processing following face inversion and contrast reversal, as an increase in the N170 amplitude, a scalp-recorded event-related potential. Here, we show that these face-specific effects are mediated by the eye region. That is, they occurred only when the eyes were present, but not when eyes were removed from the face. The N170 recorded to inverted and negative faces likely reflects the processing of the eyes. We propose a neural model of face processing in which face- and eye-selective neurons situated in the superior temporal sulcus region of the human brain respond differently to the face configuration and to the eyes depending on the face context. This dynamic response modulation accounts for the N170 variations reported in the literature. The eyes may be central to what makes faces so special.

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