Korsakoff 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 alcoholicpsychosis, he introduced the concept of paranoia and wrote an excellent textbook on psychiatry. Korsakoff studied the effects of alcoholism on the nervous system and drew attention to several cases of alcoholic polyneuropathy with distinctive mental symptoms. An able organiser, he 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, Korsakoff's Journal of Neuropathology and Psychiatry) was named after him.