Normal changes of the aging brain include
A)increased velocity of nerve conduction.
B)diminished perception of touch.
C)increased total number of neurons.
D)decreased dermatomes.
E)diminished intelligence quotient.

Question

Quizplus · Accepted Answer

Sensory perceptions of touch and pain are diminished by aging. The velocity of nerve impulse conduction declines, so response to stimuli takes longer. The number of cerebral neurons is thought to decrease by 1% a year beginning at 50 years of age; however, the vast number of reserve cells inhibits the appearance of clinical signs. Dermatomal patterns do not change. Acquired knowledge is maintained throughout life.

Normal Changes of the Aging Brain Include