Central cross-integration of visual inputs presented simultaneously to the separate eyes.

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Abstract
Cats selected the more intense of 2 light stimuli relayed separately to the 2 eyes. Section of optic chiasm, corpus callosum, and hippocampal and habenular commissures did not affect performance, but subsequent section of anterior and posterior commissures produced a significant decrement Simultaneous section of all the above plus commissure of superior colliculi produced no greater deficit. Presumably tegmental pathways made possible retraining of all 5 Ss to criterion. 1 S with unilateral cortical removal showed low accuracy with both inputs to ablated side, higher accuracy with one input to ablated side, one to intact side, and highest accuracy with both inputs to intact side. Thus the cortex appears to play a critical role in the required integration.

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