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| Research article summary (published 11 Jun 2003): |
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V1 neurons signal acquisition of an internal representation of stimulus location.
Full Abstract
A fundamental aspect of visuomotor behavior is deciding where to look or move next. Under certain conditions, the brain constructs an internal representation of stimulus location on the basis of previous knowledge and uses it to move the eyes or to make other movements. Neuronal responses in primary visual cortex were modulated when such an internal representation was acquired:
Responses to a stimulus were affected progressively by sequential presentation of the stimulus at one location but not when the location was varied randomly. Responses of individual neurons were spatially tuned for gaze direction and tracked the Bayesian probability of stimulus appearance. We propose that the representation arises in a distributed cortical network and is associated with systematic changes in response selectivity and dynamics at the earliest stages of cortical visual processing.
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Author information
Author/s: Sharma, Jitendra (J); Dragoi, Valentin (V); Tenenbaum, Joshua B (JB); Miller, Earl K (EK); Sur, Mriganka (M);
Affiliation: Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. jeetu(-atsign-)mit.edu
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.
Journal: Science (New York, N.Y.) (Science), published in United States. (Language: eng)
Reference: 2003-Jun; vol 300 (issue 5626) : pp 1758-63
Dates: Created 2003/06/13; Completed 2003/06/30; Revised 2007/03/19;
PMID: 12805552, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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