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Intracranial Markers of Conscious Face Perception in Humans
Preprint   Open access

Intracranial Markers of Conscious Face Perception in Humans

Fabiano Baroni, Jochem Kempen, Hiroto Kawasaki, Christopher K Kovach, Hiroyuki Oya, Matthew A Howard, Ralph Adolphs and Naotsugu Tsuchiya
bioRxiv: the preprint server for biology
Cold Spring Harbor Laboratory
02/01/2016
DOI: 10.1101/037234
url
https://doi.org/10.1101/037234View
Preprint (Author's original)This preprint has not been evaluated by subject experts through peer review. Preprints may undergo extensive changes and/or become peer-reviewed journal articles. Open Access

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Abstract

The comparison between perceived and unperceived trials at perceptual threshold isolates not only the core neuronal substrate of a particular conscious perception, but also aspects of brain activity that facilitate, hinder or tend to follow conscious perception. We take a step towards the resolution of these confounds by combining an analysis of ECoG neuronal responses observed during the presentation of faces partially masked by Continuous Flash Suppression, and those responses observed during the unmasked presentation of faces and other images in the same subjects. Neuronal activity in both the fusiform gyrus and the superior temporal sulcus discriminated seen vs. unseen faces in the masked paradigm and upright faces vs. other categories in the unmasked paradigm. However, only the former discriminated upright vs. inverted faces in the unmasked paradigm. Our results suggest a prominent role for the fusiform gyrus in the configural perception of faces.

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