The sternal head of the pectoralis major muscle is innervated by the lateral pectoral nerve arising from C5, C6, and C7.

Question

Quizplus · Accepted Answer

The sternal head of the pectoralis major muscle is primarily innervated by the medial pectoral nerve, which arises from the medial cord of the brachial plexus, receiving fibers from C8 and T1. The lateral pectoral nerve, arising from C5, C6, and C7, mainly innervates the clavicular head of the pectoralis major.

The Sternal Head of the Pectoralis Major Muscle Is Innervated