Arkansas Esthetician Practice Exam

The accessory nerve, also known as the eleventh cranial nerve, is responsible for controlling the motion and function of several neck muscles, including the sternocleidomastoid and trapezius muscles. These muscles work together to allow for movements of the head, neck, and shoulders. Option B is incorrect because sensation in the arms is controlled by sensory nerves, not the accessory nerve. Option C is incorrect because breathing is regulated by the phrenic nerve, and option D is incorrect because heart rate is controlled by the vagus nerve. The accessory nerve is specifically responsible for movement, not sensory or autonomic functions.