The German psychiatrist who systematically defined "dementia praecox" was

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Emil Kraepelin is credited with establishing the diagnostic category of "dementia praecox," later renamed as schizophrenia. Eugen Bleuler refined and expanded upon Kraepelin's work, but Kraepelin is considered the primary founder of the concept. Adolf Meyer and Benedict Morel were also important figures in the history of psychiatry, but did not specifically define dementia praecox.

The German Psychiatrist Who Systematically Defined "Dementia Praecox" Was