DR. GUY LESCHZINER is the author of The Nocturnal Brain, as well as a professor of neurology and sleep medicine in London. He sees patients with a range of neurological and sleep disorders, and is ...ver maisDR. GUY LESCHZINER is the author of The Nocturnal Brain, as well as a professor of neurology and sleep medicine in London. He sees patients with a range of neurological and sleep disorders, and is actively involved in research and teaching. He has also presented series on sleep and neurology for BBC World Service and Radio 4.ver menos