Differences of visual field representation in the medial and lateral banks of the suprasylvian cortex (PMLS/PLLS) of the cat

Experimental Brain Research
T J ZumbroichC Blakemore

Abstract

We have studied the orderliness of representation of visual space in the medial and lateral banks of the middle suprasylvian sulcus. Penetrations were made either parallel to the sulcus, in one bank or the other, or vertical, thus crossing the sulcus between the postero-medial (PMLS) and posterolateral (PLLS) divisions of this area. In some cases we found clear evidence for topographical order in the representation of the visual field with a tendency (greater in PMLS than in PLLS) for the receptive fields of cells recorded deeper in the walls of the sulcus to lie closer to the area centralis, but along many penetrations the receptive fields were so large and so scattered that no retinotopic arrangement could be discerned. In PMLS the receptive fields of the majority of units we studied were centered below and close to the horizontal meridian, whereas in PLLS they were distributed over both the upper and lower visual fields with an over-representation of the upper field. Receptive fields were significantly larger in PLLS (mean field area = 442.2 deg2) than in PMLS (mean area = 154.4 deg2); there was also less clear correlation between receptive field size and eccentricity in PLLS (correlation coefficient = +0.25) than in PMLS (c...Continue Reading

Citations

Jan 1, 1991·Comparative Biochemistry and Physiology. C, Comparative Pharmacology and Toxicology·T Bando, H Toda
Mar 7, 2000·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·C C Hilgetag, S Grant
May 22, 1989·The Journal of Comparative Neurology·P A SalinH Kennedy
Mar 22, 1988·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·D J PriceC Blakemore

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