Siamese cats: abnormal responses of retinal ganglion cells

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Science  08 Jul 1977:
Vol. 197, Issue 4299, pp. 173-174
DOI: 10.1126/science.877550


Comparison of optic tract recordings in Siamese and ordinary cats reveals that Siamese cats have a significantly lower percentage of Y-cells than of X-cells. In addition, Siamese cats show depressed responses to a contrast-reversal stimulus, a result that supports the lower spatial contrast sensitivity demonstrated behaviorally by these animals. Both physiological findings suggest neurophysiological anomalies in the Siamese retina.