Abstract
The electroencephalographic changes associated with the major and minor syndromes of basilar-vertebral insufficiency are reviewed in 40 cases. Nineteen of the recordings were assessed as being within normal limits. Among the abnormalities, temporal-lobe disturbances were the commonest finding-13 out of a total of 21 abnormal records. The importance of recognizing the occurrence of focal disturbances in the electroencephalogram in association with the syndrome of basilar-vertebral insufficiency is stressed, for angio-graphy and air-encephalography are poorly tolerated in these patients. The high incidence of normal records and the non-specific nature of many of the abnormalities limit the value of the electroencephalogram, but nevertheless in some cases it provides useful additional information.