Visual evoked response in senile and presenile dementia

The visual cortical evoked response was studied in 19 patients suffering from a condition diagnosed as senile or presenile (type Alzheimer) dementia. When compared with a group of normal subjects used as reference group, the latencies of waves II through VI were increased or markedly increased in these patients, and the amplitudes of waves III and VI (and, less consistently, those of waves II and IV) were increased. This corroborates the sparse data on other types of dementia available in the literature.