Alzheimer's was first found by a Dr. Alois Alzheimer's in 1906 in Germany. One of the doctors patients had died after years of having problems with their loss of memory and confusion.
Upon their death the doctor performed a brain autopsy and Dr. Alzheimer's noticed the patient had dense deposits of (neuritis plaques). He also noted the brain had many twisted bands of fibers (neurofibrillary tangles).
In the 60's doctors discovered a link between cognitive decline and the number of plaques and tangles in the brain. In the 70's,scientists made great strides and Alzheimer's/Dementia become a key center of interest.
Today there are a number of treatment options approved by the FDA, but, there still is NO CURE for Alzheimer's/Dementia. Today's drugs only treat the symptoms and not the disorder.