Plants in treating senile dementia in the northwest Amazon

The Indians of the northwest Amazon respect age and try to care for those suffering from senile dementia. At least 25 species of plants are employed in treating Alzheimer's disease or similar problems. The plants are administered orally as teas of the leaves or roots and over a period of several days to numerous weeks. The plants are from 15 phanerogamic families. Little chemistry is known of most of the species. In view of the current interest in Alzheimer's disease and related problems these species might profitably be investigated.