Dynamic surrounds of receptive fields in primate striate cortex: a physiological basis for perceptual completion? - PubMed (original) (raw)

Dynamic surrounds of receptive fields in primate striate cortex: a physiological basis for perceptual completion?

M Fiorani Júnior et al. Proc Natl Acad Sci U S A. 1992.

Abstract

Visual receptive fields (RFs) were mapped inside and outside the cortical representation of the optic disk in the striate cortex (area V1) of anesthetized and paralyzed Cebus monkeys. Unexpectedly, most cells were found to be binocularly driven, and the RFs mapped with contralateral-eye stimulation progressed in a topographically appropriate fashion as the optic disk sector was crossed. Activation of these neurons by the contralateral eye was shown to depend on stimulation of the parts of the retina around the optic disk. Outside the optic disk representation, a similar effect was demonstrated by obstructing the "classical" RF with masks 5-10 times larger in size. In all cases, visual stimuli presented around the mask could be used to accurately interpolate the position of the hidden RF. These properties reflect, at a cellular level, the process of "filling in" that allows for completion of the visual image across natural and artificially induced scotomas.

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References

    1. Proc R Soc Lond B Biol Sci. 1983 Mar 22;217(1209):449-70 - PubMed
    1. J Comp Neurol. 1974 Dec 1;158(3):295-305 - PubMed
    1. Exp Brain Res. 1992;88(2):249-64 - PubMed
    1. Brain Res. 1979 Jul 27;171(1):11-28 - PubMed
    1. Neuroscience. 1983 Nov;10(3):639-65 - PubMed

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