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Frank Gersh, PhD; Antonio R. Damasio, MD

Arch Neurol. 1981;38(10):634-636.

Abstract
• A patient who had damage to the leftward outflow of the body of the corpus callosum experienced the development of agraphia, but not apraxia, of the left hand. In another case reported recently, a similar lesion produced the same intriguing dissociation. We suggest that the principal interhemispheric controls for praxis and for writing of the left hand operate at different levels of the corpus callosum.

Author Affiliations
From the Department of Neurology, Division of Behavioral Neurology and Benton Laboratory of Neuropsychology, University of Iowa College of Medicine, Iowa City.

Footnotes
Accepted for publication Dec 30, 1980.

Reprint requests to Department of Neurology, University of Iowa Hospitals and Clinics, Iowa City, IA 52242 (Dr Damasio).