A flexible readout mechanism of human sensory representations

Nature Communications
Daniel Birman, Justin L Gardner

Abstract

Attention can both enhance and suppress cortical sensory representations. However, changing sensory representations can also be detrimental to behavior. Behavioral consequences can be avoided by flexibly changing sensory readout, while leaving the representations unchanged. Here, we asked human observers to attend to and report about either one of two features which control the visibility of motion while making concurrent measurements of cortical activity with BOLD imaging (fMRI). We extend a well-established linking model to account for the relationship between these measurements and find that changes in sensory representation during directed attention are insufficient to explain perceptual reports. Adding a flexible downstream readout is necessary to best explain our data. Such a model implies that observers should be able to recover information about ignored features, a prediction which we confirm behaviorally. Thus, flexible readout is a critical component of the cortical implementation of human adaptive behavior.

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Citations

May 7, 2020·Frontiers in Computational Neuroscience·Grace W Lindsay
Oct 4, 2020·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Bo-Yeong WonJoy J Geng
Jul 30, 2021·Psychonomic Bulletin & Review·Bo-Yeong WonJoy J Geng

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