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Is delayed foveal feedback critical for extra-foveal perception?

By Christopher D. Chambers, Christopher P. G. Allen, Leah Maizey and Mark A. Williams

Abstract

Recent neuroimaging evidence suggests that visual inputs arising beyond the fovea can be ‘fed back’ to foveal visual cortex to construct a new retinotopic representation. However, whether these representations are critical for extra-foveal perception remains unclear. Using transcranial magnetic stimulation we found that relatively late (350–400 msec) disruption of foveal retinotopic cortex impaired perceptual discrimination of objects in the periphery. These results are consistent with the hypothesis that feedback to the foveal retinotopic cortex is crucial for extra-foveal perception, and provide additional evidence for ‘constructive’ feedback in human vision

Topics: BF Psychology, RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Publisher: Elsevier
Year: 2013
DOI identifier: 10.1016/j.cortex.2012.03.007
OAI identifier: oai:http://orca.cf.ac.uk:31304
Provided by: ORCA
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