Psychosis is a symptom of mental illness characterized by severe impairment in cognitive, affective, and social functioning. Features of psychosis include grossly impaired reality testing, hallucinations, delusions, paranoia, disorganized thinking, interpersonal and social difficulties, and a lack of awareness that the behavior is unusual.
Karl Friedrich Canstatt (1807–1850), a German physician and author, introduced the concept of “psychosis” into the psychiatric literature in 1841. He used the term synonymously with “psychic neurosis” and emphasized, for the first time, a psychic manifestation of brain disease (Burgy 2008). Baron Ernst von Feuchtersleben (1806–1849), an Austrian physician, poet, and philosopher, is credited with first using the term psychosis synonymously with “psychopathy” in 1845.
During the second half of the nineteenth century, the term psychosis was widely used and considered synonymous with terms such as “mental disorder,”...
References and Readings
- American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th Ed., DSM-5) Washington, DC: American Psychiatric Association.Google Scholar
- Sadock, B., Sadock, V., & Ruiz, P. (2015). Kaplan & Sadock’s synopsis of psychiatry: Behavioral sciences/clinical psychiatry (11th ed.). Philadelphia: Lippincott Williams & Wilkins.Google Scholar