Modulation of face processing by emotional expression and gaze direction during intracranial recordings in right fusiform cortex

Journal of Cognitive Neuroscience
Gilles PourtoisPatrik Vuilleumier

Abstract

We recorded intracranial local field potentials from structurally intact human visual cortex during several face processing tasks in a patient before brain surgery. Intracranial local field potentials were measured from subdural electrodes implanted in a right fusiform region with face-sensitive activity and a more medial location in posterior parahippocampal gyrus with house-selective activity. This electrode implantation allowed us to compare neural responses with different facial properties within two adjacent but functionally distinct cortical regions. Five experiments were conducted to determine the temporal dynamics of perceptual (Experiments 1 and 5), emotional (Experiments 2 and 3), and social (Experiment 4) effects on face-specific responses in the right fusiform. Our findings showed an early negative deflection (N200) that primarily reflected category-selective perceptual encoding of facial information, whereas higher order effects of face individuation, emotional expression, and gaze direction produced selective modulations in the same face-specific region during a later time period (from 200 to 1000 msec after onset). These results shed new lights on the time course of face recognition mechanisms in human visual cor...Continue Reading

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Citations

Sep 7, 2011·Cerebral Cortex·Markus GschwindPatrik Vuilleumier
Dec 22, 2011·Journal of Cognitive Neuroscience·Hiroto KawasakiRalph Adolphs
Dec 17, 2011·PloS One·Marzia De LuciaSophie Schwartz
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Apr 22, 2021·Social Neuroscience·Caitlin M HudacRaphael Bernier
Dec 24, 2021·Social Cognitive and Affective Neuroscience·Daniel S WeisholtzTracy Butler
Jan 15, 2022·Cerebral Cortex·Maud FrotLuis Garcia-Larrea

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