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Motor abilities after frontal leukotomy

Department of Neurology (Dr. Benson), U.C.L.A., Los Angeles, CA, and the Schools of Medicine and Psychology (Dr. Stuss), University of Ottawa; Ottawa General Hospital, Ottawa, Ontario, Canada.

The effect of bilateral frontal leukotomy on motor function was evaluated by neurologic examination, tests of praxis, and appropriate neuropsychologic tests administered to five groups of subjects. Postleukotomy schizophrenic patients were subdivided into three degrees of recovery. Two nonleukotomized groups served as controls for effects of schizophrenia, age, and education. The results indicate that the size of the bifrontal damage was not significant in the response to the motor tests, whereas the severity of schizophrenia clearly affected results. As tested, bilateral orbitofrontal white matter lesions did not disturb motor competency.

Address correspondence and reprint requests to Dr. Benson, Department of Neurology, U.C.L.A. School of Medicine, 710 Westwood Plaza, Los Angeles, CA 90024.

This research was supported in part by Grant No. NSO6209 from the National Institute of Health to Boston University School of Medicine, the Research Service of the Veteran's Administration, University of Ottawa Faculty of Social Sciences Grant, the National Research Council of Canada, the Ontario Mental Health Foundation, and the Augustus S. Rose Endowment Fund. Patients were from the Northampton VA Medical Center, courtesy of Dr. Wm. Weir.

Accepted for publication May 4, 1982.

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