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Fast backprojections from the motion to the primary visual area necessary for visual awareness.

Authors
Type
Published Article
Journal
Science (New York, N.Y.)
Publication Date
Volume
292
Issue
5516
Pages
510–512
Identifiers
PMID: 11313497
Source
Medline
License
Unknown

Abstract

Much is known about the pathways from photoreceptors to higher visual areas in the brain. However, how we become aware of what we see or of having seen at all is a problem that has eluded neuroscience. Recordings from macaque V1 during deactivation of MT+/V5 and psychophysical studies of perceptual integration suggest that feedback from secondary visual areas to V1 is necessary for visual awareness. We used transcranial magnetic stimulation to probe the timing and function of feedback from human area MT+/V5 to V1 and found its action to be early and critical for awareness of visual motion.

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