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PLoS One. 2017 Nov 30;12(11):e0188834. doi: 10.1371/journal.pone.0188834. eCollection 2017.

Network dynamics of human face perception.

Author information

1
Vivian Smith Department of Neurosurgery, Univ. of Texas Medical School at Houston, Houston, Texas, United States of America.
2
Memorial Hermann Hospital, Texas Medical Center, Houston, Texas, United States of America.

Abstract

Prevailing theories suggests that cortical regions responsible for face perception operate in a serial, feed-forward fashion. Here, we utilize invasive human electrophysiology to evaluate serial models of face-processing via measurements of cortical activation, functional connectivity, and cortico-cortical evoked potentials. We find that task-dependent changes in functional connectivity between face-selective regions in the inferior occipital (f-IOG) and fusiform gyrus (f-FG) are bidirectional, not feed-forward, and emerge following feed-forward input from early visual cortex (EVC) to both of these regions. Cortico-cortical evoked potentials similarly reveal independent signal propagations between EVC and both f-IOG and f-FG. These findings are incompatible with serial models, and support a parallel, distributed network underpinning face perception in humans.

PMID:
29190811
PMCID:
PMC5708727
DOI:
10.1371/journal.pone.0188834
[Indexed for MEDLINE]
Free PMC Article

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