[Clinical findings in Alzheimer dementia and multi-infarct dementia]

From 1969 to 1989, 63 patients with dementia of the Alzheimer-type (DAT), 84 patients with multi-infarct dementia (MID), and 52 mixed type patients were treated. Two-thirds of the patients were women. Among the 66 men, 23% belonged to the DAT-group, and 56% to the MID-group. While the DAT-group, with regard to the age at on-set of dementia, showed a bimodal distribution with peaks at 51-55 years and at 71-75 years, in the MID-patients and in the MB-patients an age-related increase up to the age of 80 years was evident. Compared to the MID-patients, in the DAT-patients pathological EEG findings were less serious, even if a considerable brain atrophy was already evident. Psychic unbalance and states of temporary mental confusion, however, were more frequent in the MID-patients.