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NEUROLOGY 1985;35:1069
© 1985 American Academy of Neurology

Episodic aphemiia and epileptic focus in nondorninant hemisphere

Relieved by section of corpus callosum

Peter D. Williamson, MD, Dennis D. Spencer, MD, Susan S. Spencer, MD, Robert Novelly, PhD and Richard H. Mattson, MD

Departments of Neurology (Drs. Williamson, S. Spencer, Novelly, and Mattson), Surgery (Neurosurgery) (Dr. D. Spencer). and Psychiatry (Dr. Novelly), Yale University School of Medicine, New Haven, CT, and West Haven VA Medical Center, West Haven, CT.

A patient had right hemiparesis since infancy. At age 31, she had recurrent right focal motor and sensory seizures. In prolonged focal seizures, she could not speak but retained most other language-related functions. Intra-carotid cerebral amytal testing demonstrated right hemisphere speech. Left intra-carotid amytal injection stopped a typical attack. Complete section of the corpus callosum abolished the aphemic episodes and reduced the frequency and intensity of the focal seizures. Focal seizure activity in the left nondominant hemisphere appears to have caused restricted functional disturbance in the right dominant hemisphere.

Address correspondence and reprint requests to Dr. Williamson. Seizure Unit, VA Medical Center, West Haven, CT 06516.

Accepted for publication October 23, 1984




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