What is the insertion of the pectoralis major?Multiple choice question.clavicle and sternumdistal humerusproximal humerusspine of scapula
Question
What is the insertion of the pectoralis major?
- clavicle and sternum
- distal humerus
- proximal humerus
- spine of scapula
Solution
Correct Answer
The insertion of the pectoralis major is the proximal humerus.
Explanation
The pectoralis major muscle originates from the clavicle and sternum as well as the costal cartilages of some ribs. Its fibers converge to attach at the greater tubercle of the proximal humerus. This muscle plays a key role in shoulder movements such as flexion, adduction, and internal rotation. The other options provided, such as "distal humerus," "spine of scapula," and "clavicle and sternum," do not accurately represent the insertion of the pectoralis major.
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