Pectoralis Minor

Description

Across the anterior thorax of an adult male, the pectoralis minor is shown as a thin, triangular muscle arising by fascicles from the external surfaces of ribs III to V near their costochondral junctions. Its fibers run superolaterally, deep to pectoralis major, to converge on the coracoid process of the scapula, placing the muscle immediately inferior to the clavicle and medial to the deltopectoral region. Adjacent landmarks logically visible in this upper body view include the clavicle, anterior ribs, and the superficial contour of pectoralis major framing the smaller pectoralis minor beneath. Functionally, this depiction clarifies how pectoralis minor draws the scapula anteriorly and inferiorly, contributing to scapular protraction and anterior tilt while acting as an accessory inspiratory muscle when the scapula is fixed. That relationship matters in the operating room: surgeons often release or split pectoralis minor near the coracoid during exposure of the axillary vessels, and its fascial plane helps define the interval between the deltopectoral approach and the deeper axillary contents. It also supports a clear teaching point for pectoralis minor syndrome, where tightness can contribute to neurovascular compression beneath the coracoid and alter scapulothoracic mechanics. Use this asset in gross anatomy and kinesiology modules covering the anterior shoulder girdle, or in orthopedic and vascular texts discussing coracoid-based approaches, axillary dissection, and scapular dyskinesis. It also suits patient-facing surgical education where a three-quarter torso perspective helps orient rib origins to the coracoid insertion without losing surface anatomy context. Anatomical accuracy verified by SciePro's Medical Advisory Board.