eight brains from patients with a mean age of 82 years showing clinical and neuropathological manifestations of senile dementia of the alzheimer type ( sdat ) and 6 control brains from individuals with a mean age of 89 years who were mentally normal or who had minimal senile impairment of memory , were selected by a rigorous elimination procedure for final evaluation from a total of 26 brains .
C0184661
procedure
C0220825
evaluation