NEET PG DENTAL EXAM

Detailed explanation-1: -The spinal component of the accessory nerve provides motor control of the sternocleidomastoid and trapezius muscles. The trapezius muscle controls the action of shrugging the shoulders, and the sternocleidomastoid the action of turning the head.

Detailed explanation-2: -The spinal accessory nerve is a purely motor entity. It innervates both the trapezius and the sternocleidomastoid muscles.

Detailed explanation-3: -also known as cranial nerve XII, the accessory nerve is primarily considered a motor nerve that supplies two muscles: the sternomastoid muscle and the trapezius muscle.