this study summarizes the findings from postmortem examination of the brains of 22 control cases without neurological deficit , 12 cases of senile dementia of the alzheimer type ( sdat ) , and nine cases of parkinson 's disease ( three without signs of intellectual deterioration , four with dementia , and two atypical with dementia nonresponsive to l-dopa treatment ) .
C0030567
parkinson 's disease
C0023570
l-dopa