If the left corticospinal tract is severed in the neck near the first cervical vertebra,
A)muscles in the right arm and leg are paralyzed.
B)muscles in the left arm and leg are paralyzed.
C)pain impulses from the right side are blocked.
D)pain impulses from the left side are blocked.

Question

Quizplus · Accepted Answer

The left corticospinal tract controls voluntary movements of the muscles in the right side of the body. Therefore, severing this tract in the neck near the first cervical vertebra would result in paralysis of the muscles in the left arm and leg.

If the Left Corticospinal Tract Is Severed in the Neck