Pectoralis Major: Structure, Origins, Insertions, and More (+ 3D models)

The video tutorial provides an in-depth analysis of the pectoralis major muscle, covering its structure, divisions, origins, insertions, innervation, blood supply, and actions. It explains the muscle's three parts: clavicular, sternocostal, and abdominal heads, and their respective origins and insertions. The tutorial also discusses the blood supply from the thoracoacromial trunk and innervation by the pectoral nerves. A 3D model is used to visualize the muscle's anatomy, and the video concludes with a detailed explanation of the muscle's actions, including shoulder flexion, lateral flexion, and medial rotation.

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