Sergei Korsakov

He studied medicine at the Moscow State University, graduated in 1875 and subsequently became a physician at the "Preobrazhenski" (Russian: Преображенский) mental hospital.

[1] Korsakov was one of the greatest neuropsychiatrists of the 19th century and published numerous works in neuropathology, psychiatry, and forensic medicine.

Apart from his studies on alcoholic psychosis, he introduced the concept of paranoia and wrote an excellent textbook on psychiatry published in 1893.

[3] An able organiser, Korsakov was instrumental in founding the Moscow Society of Neuropathologists and Psychiatrists.

The Zhurnal nevropatologii i psikhiatrii imeni Korsakova (Russian: Журнал невропатологии и психиатрии имени Корсакова, Korsakov Journal of Neurology and Psychiatry) was named after him.