Pectoralis Minor

Pectoralis minor is a thin, triangular muscle of the anterior chest that contributes to scapular control and upper-limb movement. It extends from the third through fifth ribs to the coracoid process of the scapula, drawing the scapula anteriorly and inferiorly while helping stabilize it against the thoracic wall. Clinically, evaluating pectoralis minor length, tone, and tenderness can clarify altered scapular mechanics, shoulder dysfunction, postural imbalance, and some neurovascular compression patterns. Because it lies deep to pectoralis major and near important nerves and vessels, detailed knowledge of this muscle supports physical examination, rehabilitation planning, injections, and surgical approaches involving the shoulder and chest.

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