Fifty-year-old Keith is informed by his doctor that his brain is showing signs of the initial development of neuritic plaques and a few neurofibrillary tangles. This is:
A) normal.
B) a definite indicator of Parkinson's disease.
C) a definite indicator of Alzheimer's disease.
D) a definite indicator of Huntington's disease.

Question

Quizplus · Accepted Answer

Neuritic plaques and neurofibrillary tangles are common findings in the aging brain and do not definitively indicate Alzheimer's disease unless accompanied by clinical symptoms. These changes can be considered part of the normal aging process in many individuals.

Fifty-Year-Old Keith Is Informed by His Doctor That His Brain