Abstract
We examined the amnesic symptoms including confabulation in 49 patients with ruptured anterior communicating artery aneurysm after operation. We studied the clinical and radiological findings of these patients before and after the operation. Amnesic symptoms developed more frequently in cases with severe neurological deficit due to subarachnoid hemorrhage and upward projection of the aneurysm. The CT findings after the operation revealed that focal cerebral damage involving basal forebrain lesion produced amnesic symptoms, and confabulation arose from more broad brain damage. In 8 patients, detailed neuropsychological investigations were performed. As a result, all patients with confabulat : on were found to show some memory disturbance, although the degree of memory disturbance was not correlated with the appearance of confabulation.
