In March 1901, the husband of a female patient had noticed an untreatable paranoid symptomatology in his wife and then – in fast progression and with increasing intensity – sleep disorders, disturbances of memory, aggressiveness, crying, and progressive confusion. Eventually, the husband was forced to take his wife to the Community Psychiatric Hospital.
Alois Alzheimer while attending the 37th Meeting of South-West German Psychiatrists described the female patient´s admission to the hospital for paranoia, progressive sleep and memory disturbance, aggression, and confusion as PRESENILE DEMENTIA.
source