noun. Deterioration of intellectual faculties, such as memory, concentration, and judgment, resulting from an organic disease or a disorder of the brain. It is sometimes accompanied by emotional disturbance and personality changes.

noun. An extremely low condition of the mental function; profound general mental incapacity.

noun. Insanity; madness; esp. that form which consists in weakness or total loss of thought and reason; mental imbecility; idiocy.

noun. A progressive decline in cognitive function due to damage or disease in the brain beyond what might be expected from normal aging. Areas particularly affected include memory, attention, judgement, language and problem solving.

noun. madness or insanity

noun. mental deterioration of organic or functional origin

"Bleuler believed, however, that the term dementia praecox was too specific and did not always fit the clinical course, which he believed more variable than originally described."

Alzheimer's disease  acute primary dementia  amentia  delirium  dementia paralytica  

demented  demential  senile dementia  

insanity  

Korsakoff's syndrome  alcohol amnestic disorder  alcoholic dementia  korsakoff's psychosis  korsakov's psychosis  

alcoholism  aphasia  apnea  arthritis  autism  

aberration  abnormality  alienation  brain damage  brainsickness