Which of the following occurs as a result of tapping one's patellar tendon?
A)Alpha motor neurons stimulate contraction of intrafusal fibers in extensor muscles
B)Alpha motor neurons stimulate contraction of extrafusal fibers in extensor muscles
C)Alpha motor neurons that innervate ipsilateral flexor muscles are inhibited
D)Both alpha motor neurons stimulate contraction of intrafusal fibers in extensor muscles and alpha motor neurons that innervate ipsilateral flexor muscles are inhibited are correct
E)Both alpha motor neurons stimulate contraction of extrafusal fibers in extensor muscles and alpha motor neurons that innervate ipsilateral flexor muscles are inhibited are correct

Question

Quizplus · Accepted Answer

Tapping the patellar tendon activates a reflex arc that leads to the contraction of extrafusal fibers in the extensor muscles (quadriceps) and inhibition of alpha motor neurons that innervate the ipsilateral flexor muscles (hamstrings).

Which of the Following Occurs as a Result of Tapping