Transection of the dorsal roots of spinal nerves C5 through T1 results in .
A) loss of movement in the upper limb on the opposite side of the body
B) loss of movement in the upper limb on the same side of the body
C) loss of sensation in the upper limb on the same side of the body
D) loss of sensation in the upper limb on the opposite side of the body

Question

Quizplus · Accepted Answer

Transection of the dorsal roots of spinal nerves affects sensory pathways, not motor pathways. Since the dorsal roots carry sensory information into the spinal cord, cutting them would result in a loss of sensation. The loss occurs on the same side of the body (ipsilateral) because sensory information does not cross to the opposite side until it reaches the brain.

Transection of the Dorsal Roots of Spinal Nerves C5 Through