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.

What is the significance of the abdominal head of the pectoralis major?

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Describe the innervation of the pectoralis major muscle.

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What role does the pectoralis major play in arm wrestling?

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How do the origins of the pectoralis major differ from its insertions?

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