ocr: First described in 1907 by Alos Alzheimer, a cerman Forma' sentence physician, Alzheimer's disease is an adult-onset neurological derniton disorder of unknown et10logY manirested by loss of memory, impaired thought processes, and abnormal behavior. When the illness begins before the age of 65, it is termed Alzheimer's. disease; when onset is after 65, it is referred to as senlle dementia of the Alzheimer's type. Approximately, 5% of the U.S. population over 65 have severe dementia; an additional 10% have Omer a mild-to-moderate impairment in memory and cognition. Of these suppementaly demented ...