Format

Send to

Choose Destination
See comment in PubMed Commons below
Nat Neurosci. 2007 Nov;10(11):1483-91. Epub 2007 Sep 30.

Attention alters spatial integration in macaque V1 in an eccentricity-dependent manner.

Author information

1
Institute of Neuroscience, Henry Wellcome Building, Framlington Place, University of Newcastle upon Tyne, Newcastle upon Tyne, NE2 4HH, UK.

Abstract

Attention can selectively enhance neuronal responses and exclude external noise, but the neuronal computations that underlie these effects remain unknown. At the neuronal level, noise exclusion might result in altered spatial integration properties. We tested this proposal by recording neuronal activity and length tuning in neurons of the primary visual cortex of the macaque when attention was directed toward or away from stimuli presented in each neuron's classical receptive field. For cells with central-parafoveal receptive fields, attention reduced spatial integration, as demonstrated by a reduction in preferred stimulus length and in the size of the spatial summation area. Conversely, in cells that represented more peripheral locations, attention increased spatial integration by increasing the cell's summation area. This previously unknown dichotomy between central and peripheral vision could support accurate analysis of attended foveal objects and target selection for impending eye movements to peripheral objects.

PMID:
17906622
PMCID:
PMC2673551
DOI:
10.1038/nn1967
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Nature Publishing Group Icon for PubMed Central
    Loading ...
    Support Center