Linked Life Data

17021020

Source:http://linkedlifedata.com/resource/pubmed/id/17021020

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2007-1-17
pubmed:abstractText
Recent studies have shown that the initial responses evoked by a stimulus in neurons of primary visual cortex are dominated by low spatial frequency information in the image, whereas finer spatial scales dominate later in the response. Such phenomena could arise from the dynamics of receptive field (RF) size at early stages of cortical processing. We measured changes in RF size in simple cells recorded from the primary visual cortex of anesthetized macaques by measuring their first-order spatio-temporal kernels and fitting them with two-dimensional Gabor functions at different time slices. We found that the width and length of the RF envelope and the period of the carrier tend to decrease during the time-course of the response. The most pronounced changes are seen in the width and spatial period of the RFs, which decrease by 15% during the central 20 ms of the response. These results show a novel form of spatio-temporal inseparability in simple cells and are consistent with the notion of a coarse-to-fine processing of information in early visual cortex.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0022-3077
pubmed:author
pubmed:issnType
Print
pubmed:volume
97
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
407-14
pubmed:dateRevised
2007-12-3
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Dynamics of receptive field size in primary visual cortex.
pubmed:affiliation
Department of Neurobiology and Psychology, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, CA 90095-1563, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, N.I.H., Extramural