INTERHEMISPHERIC COMPARISON OF COLOR IN SPLIT-BRAIN MONKEYS

Monkeys with varying degrees of brain bisection were trained on a visual discrimination that required interhemispheric integration of sensory information for its solution. A matching-to-sample task was used in which the sample was projected to one hemisphere and the two choices for the match were projected to the other hemisphere. Monkeys with complete section of the optic chiasm and forebrain commissures could not solve this task. There was some evidence of interhemispheric integration via portions of the hippocampal commissure or corpus callosum anterior to the splenium. Various strategems unrelated to the visual stimuli were sometimes employed for above-chance performance. © 1968.