Oliver Sacks

The famed neurologist talks to Fresh Air about how grief, trauma, brain injury, medications and neurological disorders can trigger hallucinations — and about his personal experimentation with hallucinogenic drugs in the 1960s.

Neurologist Oliver Sacks is famous for his case studies of people with neurological disorders that cause unusual problems with perception. In The Mind's Eye, Sacks turns to himself, explaining how an eye tumor affected his vision and perception of the world.

In the book Musicophilia: Tales of Music and the Brain, neurologist Oliver Sacks explores the relationship between music and the mind.

Through a series of case studies ranging from songs stuck in one's mind to a newfound passion for concert piano after being struck by lightning, the professor of Neurology at the Albert Einstein College of Medicine and the NYU School of Medicine examines the complexity of human beings and the role music plays in our lives.