Network dynamics of human face perception

doi:10.1371/journal.pone.0188834

Paper

Network dynamics of human face perception

Published Nov 30, 2017 · C. Kadipasaoglu, Christopher R. Conner, Vatche G. Baboyan

PLoS ONE

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11

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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.

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Study Snapshot

Key takeawayHuman face perception involves a parallel, distributed network, rather than a serial, feed-forward process, supporting a parallel, distributed network underpinning face perception.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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