<P> The botanical taxonomic approach was abandoned in the 19th century, in favor of an anatomical - clinical approach that became increasingly descriptive . There was a focus on identifying the particular psychological faculty involved in particular forms of insanity, including through phrenology, although some argued for a more central "unitary" cause . French and German psychiatric nosology was in the ascendency . The term "psychiatry" ("Psychiatrie") was coined by German physician Johann Christian Reil in 1808, from the Greek "ψυχή" (psychē: "soul or mind") and "ιατρός" (iatros: "healer or doctor"). The term "alienation" took on a psychiatric meaning in France, later adopted into medical English . The terms psychosis and neurosis came into use, the former viewed psychologically and the latter neurologically . </P> <P> In the second half of the century, Karl Kahlbaum and Ewald Hecker developed a descriptive categorizion of syndromes, employing terms such as dysthymia, cyclothymia, catatonia, paranoia and hebephrenia . Wilhelm Griesinger (1817--1869) advanced a unitary scheme based on a concept of brain pathology . French psychiatrists Jules Baillarger described "folie à double forme" and Jean - Pierre Falret described "la folie circulaire"--alternating mania and depression . </P> <P> The concept of adolescent insanity or developmental insanity was advanced by Scottish Asylum Superintendent and Lecturer in Mental Diseases Thomas Clouston in 1873, describing a psychotic condition which generally afflicted those aged 18--24 years, particularly males, and in 30% of cases proceeded to "a secondary dementia". </P> <P> The concept of hysteria (wandering womb) had long been used, perhaps since ancient Egyptian times, and was later adopted by Freud . Descriptions of a specific syndrome now known as somatization disorder were first developed by the French physician, Paul Briquet in 1859 . </P>

Who is credited with developing a classification system for mental disorders