If the Posterior Root of a Spinal Nerve is Severed

Question

If the posterior root of a spinal nerve is severed,
A) output to skeletal muscles would be blocked.
B) output to visceral organs would be blocked.
C) efferent fibers would be blocked.
D) the brain would not be able to communicate with that level of the spinal cord.
E) sensory input would be blocked.

Accepted Answer

The posterior root of a spinal nerve contains sensory fibers. If it is severed, sensory input from the corresponding region of the body would be blocked.