Oliver Sacks is a well-known British specialist in neurology and neuropsychology, who wrote several popular books translated into many languages. His books “The Man Who Mistook His Wife for a Hat” and “The Anthropologist on Mars” became bestsellers, and one of them served as the basis for a film starring Robert De Niro.
One of his books tells about lethargic encephalitis—a disease that swept across the whole world in 1918–20. Dozens of people fell ill and went into deep sleep for fifty years, considered hopeless. However, in the 1970s, when a new medication for Parkinson’s disease appeared on the market, Oliver Sacks decided to try it on patients with lethargic encephalitis.