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"Central" commissurotomy for intractable generalized epilepsy

Series two

Sections of Neurosurgery and Neurology, Dartmouth-Hitchcock Medical Center, Hanover, NH, and the Department of Neurology, Cornell University Medical Center, New York, NY.

A second consecutive series of 12 patients underwent microsurgical "central" commissurotomy (division of the entire corpus callosum and hippocampal commissure) for the relief of previously intractable generalized seizures. This modified operation was found to be safer than the multiple commissurotomies performed in the first series of eight patients and was equally effective. Central commissurotomy was modified further by being performed in two stages, which reduced the length and severity of the "acute disconnection syndrome," a common cause of morbidity in the early postoperative phase.

Best results were obtained in patients who were not severely retarded, had signs of unilateral cerebral damage, and included akinetic spells as a prominent form of their generalized seizures. EEG showed that bilateral symmetric discharges became either unilateral or asymmetric after surgery, which emphasized the important role played by the corpus callosum in conducting seizure discharges from one hemisphere to the other.

Address correspondence and reprint requests to Dr. Wilson, Dartmouth-Hitchcock Medical Center, Hanover, NH 03755.

Accepted for publication December 10, 1981.

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