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The bottom-up and top-down processing of faces in the human occipitotemporal cortex.

07:00 EST 14th January 2020 | BioPortfolio

Summary of "The bottom-up and top-down processing of faces in the human occipitotemporal cortex."

Although face processing has been studied extensively, the dynamics of how face-selective cortical areas are engaged remains unclear. Here we uncovered the timing of activation in core face-selective regions using functional Magnetic Resonance Imaging and Magnetoencephalography in humans. Processing of normal faces started in the posterior occipital areas and then proceeded to anterior regions. This bottom-up processing sequence was also observed even when internal facial features were misarranged. However, processing of two-tone Mooney faces lacking explicit prototypical facial features engaged top-down projection from the right posterior fusiform face area to right occipital face area. Further, face-specific responses elicited by contextual cues alone emerged simultaneously in the right ventral face-selective regions, suggesting parallel contextual facilitation. Together, our findings chronicle the precise timing of bottom-up, top-down, as well as context-facilitated processing sequences in the occipital-temporal face network, highlighting the importance of the top-down operations especially when faced with incomplete or ambiguous input.

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This article was published in the following journal.

Name: eLife
ISSN: 2050-084X
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