The Serratus Anterior Muscle is Innervated by (The)________

Question

The serratus anterior muscle is innervated by (the)________.
A) cervical nerves
B) accessory nerve
C) dorsal scapular nerve
D) long thoracic nerve
E) None of the answers are correct.

Accepted Answer

The serratus anterior muscle is innervated by the long thoracic nerve, which arises from the roots of the cervical plexus (C5-C7). The accessory nerve (CN XI) innervates the trapezius and sternocleidomastoid muscles, the dorsal scapular nerve (C4-C5) innervates the rhomboid muscles, and cervical nerves innervate various muscles in the neck region. Therefore, the correct answer is D) long thoracic nerve.