General Organization of Callosal Connections in the Cerebral Cortex

The necessity of interhemispheric connections, and the nature of this necessity, are demonstrated by the following hypothetical event. An intelligent being from outer space lands on earth and is asked to design the brain of a cat. The being is intrigued to find that the body of a cat is bilaterally symmetric (he looks himself rather like a multieyed and multiwhiskered octopus).

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