Cranial Nerve XI functions include which of the following?

Cranial Nerve XI functions include which of the following?

• A. Tongue movement
• B. Throat sensation, taste, swallowing
• C. Hearing and balance
• D. Neck movement

Answer: (D)

Cranial nerve XI, the accessory nerve, is mainly involved in moving the head and neck. It innervates the sternocleidomastoid and trapezius muscles. The sternocleidomastoid allows turning the head and flexing the neck, while the trapezius elevates the shoulders and helps extend the neck. These actions account for neck movement being the key function of this nerve. Other options point to different nerves: tongue movement is controlled by the hypoglossal nerve, throat sensation, taste, and swallowing involve the glossopharyngeal and vagus nerves, and hearing and balance are handled by the vestibulocochlear nerve.

Cranial nerve XI, the accessory nerve, is mainly involved in moving the head and neck. It innervates the sternocleidomastoid and trapezius muscles. The sternocleidomastoid allows turning the head and flexing the neck, while the trapezius elevates the shoulders and helps extend the neck. These actions account for neck movement being the key function of this nerve.

Other options point to different nerves: tongue movement is controlled by the hypoglossal nerve, throat sensation, taste, and swallowing involve the glossopharyngeal and vagus nerves, and hearing and balance are handled by the vestibulocochlear nerve.