Adaptation to feedback representation of illusory orientation produced from flash grab effect

Yijun Ge, Hao Zhou, Chencan Qian, Peng Zhang, Lan Wang () and Sheng He ()
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Yijun Ge: Chinese Academy of Sciences
Hao Zhou: Chinese Academy of Sciences
Chencan Qian: Chinese Academy of Sciences
Peng Zhang: Chinese Academy of Sciences
Lan Wang: Chinese Academy of Sciences
Sheng He: Chinese Academy of Sciences

Nature Communications, 2020, vol. 11, issue 1, 1-12

Abstract: Abstract Adaptation is a ubiquitous property of sensory systems. It is typically considered that neurons adapt to dominant energy in the ambient environment to function optimally. However, perceptual representation of the stimulus, often modulated by feedback signals, sometimes do not correspond to the input state of the stimulus, which tends to be more linked with feedforward signals. Here we investigated the relative contributions to cortical adaptation from feedforward and feedback signals, taking advantage of a visual illusion, the Flash-Grab Effect, to disassociate the feedforward and feedback representation of an adaptor. Results reveal that orientation adaptation is exclusively dependent on the perceived rather than the retinal orientation of the adaptor. Combined fMRI and EEG measurements demonstrate that the perceived orientation of the Flash-Grab Effect is indeed supported by feedback signals in the cortex. These findings highlight the important contribution of feedback signals for cortical neurons to recalibrate their sensitivity.

Date: 2020
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DOI: 10.1038/s41467-020-17786-1

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