Abstract
A 69-year-old right-handed female was admitted to the hospital on Nov. 27, 1982, because of the disturbance of standing and gait. She had suffered from right hemiparesis in 1980, and the small infarction in the thalamic region had been pointed out by CT. But she had almost recoverd. On November 24, 1982, she suddenly fell and then she could not walk. On admission, her consciousness was alert. Her blood pressure was 160/110, pulse rate was 90/min with irregular rhythm (atrial fibrillation).
Neurological examinations revealed mild left hemiparesis and clumsiness of the right hand but no apparent cerebellar ataxia. She could not keep standing position and fell to back straightly. She could not step forward even by supporting her hands. But her voluntary movements of legs on the bed were almost skillful!. She could write letters by the right hand but apraxic agraphia was observed in her left hand writing. No sensory disturbances inclusing position sense were noted.
CT scan revealed the lesion in the anterior half of the right corpus callosum and involved a small part of the cinglate gyrus. On the 3rd hospital day, she could sit and stand. On the 4th hospital day, she was able to walk by assistance. The 14th days after the admission, she could walk by herself, but small steppage gait was observed.
This case shows that the corpus callosum may play a some kind of role in walking.
