[Peduncular hallucinosis in a young woman with vertebrobasilar insufficiency based on severe hypoplasia of a vertebral artery, demonstrated angiographically].

A clinical case of peduncular hallucinosis due to circulatory insufficiency of the cerebral trunk is reported. Angiography revealed marked hypoplasia of a vertebral artery. The patient presented changes to sleep-arousal rhythms and neurological signs with focus involving the cerebral trunk. The patient took an emotional part in her visual hallucinations even though she was aware that they were only hallucinations. A review of the literature on the subject follows.