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Curr Opin Neurobiol. 2003 Aug;13(4):421-7.

Colour coding in the primate retina: diverse cell types and cone-specific circuitry.

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  • 1University of Washington, Department of Biological Structure & Washington National Primate Research Centre, HSC G514 Seattle, WA 98195-7420, USA. dmd@u.washington.edu

Abstract

How is the trichromatic cone mosaic of Old World primates sampled by retinal circuits to create wavelength opponency? Red-green (L versus M cone) opponency appears to be mediated largely by the segregation of L versus M cone signals to the centre versus the surround of the midget ganglion cell receptive field, implying a complex cone type-specific wiring, the basis of which remains mysterious. Blue-yellow (S versus L+M cone) opponency is mediated by a growing family of low-density ganglion types that receive either excitatory or inhibitory input from S cones. Thus, the retinal circuits that underlie colour signalling in primates may be both more complex and more diverse then previously appreciated.

PMID:
12965288
[PubMed - indexed for MEDLINE]

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