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)the spinal cord would not be able to process information at that level.
D)the brain would not be able to communicate with that level of the spinal cord.
E)sensory input would be blocked.

Question

Quizplus · Accepted Answer

The posterior root of a spinal nerve contains sensory fibers that transmit information from the sensory receptors in the skin, muscles, and internal organs to the spinal cord. If the posterior root is severed, sensory input from that area would be blocked. Output to skeletal and visceral muscles would not be affected because these fibers are carried by the anterior root of the spinal nerve. The spinal cord would still be able to process information at that level, but it would not receive any sensory input from the affected area. The brain would also be able to communicate with that level of the spinal cord, but it would not receive any sensory information from the affected area.

If the Posterior Root of a Spinal Nerve Is Severed