Progressive supranuclear palsy (PSP; or the Steele-Richardson-Olszewski syndrome, after the doctors who described it in 1963) is a degenerative disease involving the deterioration and death of specific volumes of the brain. Males and females are affected the same equally and there is no racial, geographical or occupational predilection. Approximately 6 people per 100,000 population have PSP. It has been described as a tauopathy.