Question

shoulder movement
which cranial nerve innervates the muscles involved in shoulder shrugging and in turning the head?
abducens
hypoglossal
accessory
vagus

Explanation:

The accessory nerve (cranial nerve XI) innervates the trapezius (involved in shoulder shrugging) and sternocleidomastoid (involved in turning the head) muscles. The abducens (cranial nerve VI) controls lateral eye movement. The hypoglossal (cranial nerve XII) controls tongue muscles. The vagus (cranial nerve X) has multiple functions including in the digestive and cardiovascular systems.

Answer:

C. Accessory