Long-Term Follow-Up of a Callosal-Sectioned Patient

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Abstract
THERE has now been an extensive experience with behavioral alterations in both animal and man with corpus callosum and other commissural sections. One of the leading questions is whether or not there is functional reorganization of the brain so that some of the demonstrated deficits would alter or disappear with the passage of time. An opportunity to study this question was provided by a long-term follow-up of such a patient. This patient is unique in that the corpus callosum was sectioned in 1940 at which time extensive testing was done, and retesting was performed 27 years later. The patient is one of the original group of callosal-sectioned patients reported by Akelaitis and his co-workers.1-7Some more recent investigations on animals and on man concerning the behavioral changes after commissural sections indicate some major defects in transfer of learned tasks between hemispheres. Investigators in this field have remarked on

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