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

Lookup NU author(s): Dr Louise Delicato, Jose Herrero, Dr Alwin Gieselmann, Professor Alexander Thiele

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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. © 2007 Nature Publishing Group.


Publication metadata

Author(s): Roberts M, Delicato LS, Herrero J, Gieselmann MA, Thiele A

Publication type: Article

Publication status: Published

Journal: Nature Neuroscience

Year: 2007

Volume: 10

Issue: 11

Pages: 1483-1491

Print publication date: 01/11/2007

ISSN (print): 1097-6256

ISSN (electronic): 1546-1726

Publisher: Nature Publishing Group

URL: http://dx.doi.org/10.1038/nn1967

DOI: 10.1038/nn1967

PubMed id: 17906622


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