Bottom-up and top-down computations in word- and face-selective cortex

The ability to read a page of text or recognize a person's face depends on category-selective visual regions in ventral temporal cortex (VTC). To understand how these regions mediate word and face recognition, it is necessary to characterize how stimuli are represented and how this representati...

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Bibliographic Details
Published in:eLife 2017-02, Vol.6
Main Authors: Kay, Kendrick N, Yeatman, Jason D
Format: Article
Language:English
Subjects:
Adult
Cognition
Cognition & reasoning
Cognitive ability
Computational and Systems Biology
computational model
Cortex (temporal)
Face
Female
fMRI
Humans
Information processing
Intraparietal sulcus
Male
Neuroscience
Pattern recognition
Pattern Recognition, Visual
Temporal Lobe - physiology
Visual cortex
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Summary:The ability to read a page of text or recognize a person's face depends on category-selective visual regions in ventral temporal cortex (VTC). To understand how these regions mediate word and face recognition, it is necessary to characterize how stimuli are represented and how this representation is used in the execution of a cognitive task. Here, we show that the response of a category-selective region in VTC can be computed as the degree to which the low-level properties of the stimulus match a category template. Moreover, we show that during execution of a task, the bottom-up representation is scaled by the intraparietal sulcus (IPS), and that the level of IPS engagement reflects the cognitive demands of the task. These results provide an account of neural processing in VTC in the form of a model that addresses both bottom-up and top-down effects and quantitatively predicts VTC responses.
ISSN:2050-084X
2050-084X
DOI:10.7554/eLife.22341