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Visual Size Processing in Early Visual Cortex Follows Lateral Occipital Cortex Involvement by Zeng (æ3⁄4è¡), Hang; Fink, Gereon R.; Weidner, Ralph is a Neuroscience article available to read on EtoBox.

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Neural activation in the early visual cortex (EVC) reflects the perceived rather than retinal size of stimuli, suggesting that feedback possibly from extrastriate regions modulates retinal size information in EVC. Meanwhile, the lateral occipital cortex (LOC) has been suggested to be critically involved in object size processing. To test for the potential contributions of feedback modulations on size representations in EVC, we investigated the dynamics of relevant processes using transcranial magnetic stimulation (TMS). Specifically, we briefly disrupted the neural activity of EVC and LOC at early, intermediate, and late time windows while participants performed size judgment tasks in either an illusory or neutral context. TMS over EVC and LOC allowed determining whether these two brain regions are relevant for generating phenomenological size impressions. Furthermore, the temporal order of TMS effects allowed inferences on the dynamics of information exchange between the two areas. Particularly, if feedback signals from LOC to EVC are crucial for generating altered size representations in EVC, then TMS effects over EVC should be observed simultaneously or later than the effects fo

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Author

Zeng (æ3⁄4è¡), Hang; Fink, Gereon R.; Weidner, Ralph

Publisher

Society for Neuroscience (ISSN 0270-6474)

Published

2020

Language

EN

Field

Neuroscience (Life Sciences)