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Face recognition in human extrastriate cortex

T Allison1, H Ginter, G McCarthy

  • 1Neuropsychology Laboratory, Veterans Administration Medical Center, West Haven, Connecticut 06510.

Journal of Neurophysiology
|February 1, 1994
PubMed
Summary
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Specific brain regions in the extrastriate visual cortex recognize faces. Electrical stimulation of these "face modules" temporarily impaired face naming, suggesting specialized neural processing for facial recognition.

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Visual Perception

Background:

  • The extrastriate visual cortex processes complex visual information.
  • Specialized neural substrates for object recognition are increasingly being identified.

Purpose of the Study:

  • To investigate the neural basis of face recognition in the human brain.
  • To identify specific brain regions involved in processing facial stimuli.

Main Methods:

  • Electrophysiological recordings (N200 potential) from chronically implanted electrodes in 24 patients viewing various visual stimuli.
  • Electrical stimulation of identified brain regions to assess functional impact.

Main Results:

  • A distinct surface-negative potential (N200) was selectively evoked by intact faces, but not by scrambled faces or other objects (cars, butterflies).

Related Experiment Videos

  • The N200 response was localized to small regions within the fusiform and inferior temporal gyri.
  • Electrical stimulation of these specific regions frequently resulted in a transient inability to name familiar faces.

    • Conclusions:

    • Discrete, individual-specific regions in the inferior extrastriate visual cortex are specialized for face recognition.
    • These specialized "face modules" are interspersed among other functionally specific cortical areas.