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Science 19 January 1968:
Vol. 159. no. 3812, pp. 308 - 310
DOI: 10.1126/science.159.3812.308
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Articles

Binocularly Driven Neurons in Visual Cortex of Split-Chiasm Cats

Giovanni Berlucchi 1 and Giacomo Rizzolatti 1

1 Istituto di Fisiologia, Università di Pisa, Pisa, Italy

In cats with midsagittal section of the optic chiasm, some visual cortex neurons can be driven not only by the ipsilateral eye, through the direct geniculocortical pathways, but also by the contralateral eye, through the opposite visual cortex and corpus callosum. The receptive fields and the response characteristics observed upon stimulation of the contralateral eye are very similar to those observed upon stimulation of the ipsilateral eye; the two monocular receptive fields of a given cell lie in corresponding points of heteronymous halves of the visual field in close contact with the vertical meridian, thus adding in visual space and forming a binocular receptive area which crosses the vertical meridian and extends equally on either side of it.


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