[Psychometric studies of cerebral performance before and following extra-intracranial bypass operations].

: 34 patients suffering from cerebro-vascular occlusive disease and treated by an extra-intracranial anastomosis (EIAB) were examined by 5 different psychological tests (Test d 2, Benton Test, Revision Test, Subtest "ZN" of the Hawie, K-L-T) before and after the operation. The results showed a significant improvement of intellectual functioning in most cases. In a addition, disturbances of drive and activity and symptoms of depression were all diminished.