If the ventral root of a spinal nerve were cut,the regions innervated by that spinal nerve would experience complete loss of
A)sensation.
B)movement.
C)sensation and movement.
D)pain.
E)None of these choices is correct.

Question

Quizplus · Accepted Answer

The ventral root of a spinal nerve contains motor fibers that innervate skeletal muscles, therefore, cutting the ventral root would result in complete loss of movement in the regions innervated by that spinal nerve. Sensory fibers, responsible for sensation, are carried by the dorsal root of the spinal nerve, so the answer cannot be A or C. Pain fibers are also carried by both the dorsal and ventral roots, so the answer cannot be D. Therefore, the correct answer is B, movement.

If the Ventral Root of a Spinal Nerve Were Cut,the