Contrast's effect on spatial summation by macaque V1 neurons

Michael P. Sceniak, Dario L. Ringach, Michael Hawken, Robert Shapley

Research output: Contribution to journalArticle

Abstract

Stimulation outside the receptive field of a primary visual cortical (V1) neuron reveals intracortical neural interactions. However, previous investigators implicitly or explicitly considered the extent of cortical spatial summation and, therefore, the size of the classical receptive field to be fixed and independent of stimulus characteristics or of surrounding context. On the contrary, we found that the extent of spatial summation in macaque V1 neurons depended on contrast, and was on average 2.3-fold greater at low contrast. This adaptive increase in spatial summation at low contrast was seen in cells throughout V1 and was independent of surround inhibition.

Original languageEnglish (US)
Pages (from-to)733-739
Number of pages7
JournalNature Neuroscience
Volume2
Issue number8
DOIs
StatePublished - 1999

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Macaca
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Contrast's effect on spatial summation by macaque V1 neurons. / Sceniak, Michael P.; Ringach, Dario L.; Hawken, Michael; Shapley, Robert.

In: Nature Neuroscience, Vol. 2, No. 8, 1999, p. 733-739.

Research output: Contribution to journalArticle

Sceniak, Michael P. ; Ringach, Dario L. ; Hawken, Michael ; Shapley, Robert. / Contrast's effect on spatial summation by macaque V1 neurons. In: Nature Neuroscience. 1999 ; Vol. 2, No. 8. pp. 733-739.
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