Fine structure of receptive-field centers of X and Y cells of the cat.

R. E. Soodak, R. M. Shapley, Robert Shapley

Research output: Contribution to journalArticle

Abstract

We investigated the fine structure of receptive field centers of X and Y cells of the retina and lateral geniculate nucleus of the cat using sinusoidal grating stimuli of high spatial frequency. By measuring orientation tuning and spatial-frequency tuning at multiple orientations, the two-dimensional sensitivity distribution was examined. We found that receptive-field centers typically have multiple sensitivity peaks that can be modeled as several spatially offset subunits. A subunit structure was found in both X and Y cells, with an average number of subunits per receptive-field center of approximately 2.9 in X cells and approximately 4.6 in Y cells. In X cells these subunits may correspond to individual cone bipolar inputs. In Y cells, the subunits may reflect the structure of the dendritic tree. The observation of the subunit structure of the receptive-field center, in conjunction with manipulation of the retinal wiring through pharmacological intervention, may provide a new tool for probing the circuitry of the retina.

Original languageEnglish (US)
Pages (from-to)621-628
Number of pages8
JournalVisual Neuroscience
Volume6
Issue number6
StatePublished - Jun 1991

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Cats
Retina
Geniculate Bodies
Observation
Pharmacology

ASJC Scopus subject areas

  • Neuroscience(all)

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Fine structure of receptive-field centers of X and Y cells of the cat. / Soodak, R. E.; Shapley, R. M.; Shapley, Robert.

In: Visual Neuroscience, Vol. 6, No. 6, 06.1991, p. 621-628.

Research output: Contribution to journalArticle

Soodak, R. E. ; Shapley, R. M. ; Shapley, Robert. / Fine structure of receptive-field centers of X and Y cells of the cat. In: Visual Neuroscience. 1991 ; Vol. 6, No. 6. pp. 621-628.
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