Musculus pectoralis major

The video tutorial discusses the pectoralis major muscle, covering its origin, structure, and function. It explains the muscle's division into three parts, its attachment to the humerus, and its innervation by the brachial plexus. The tutorial highlights the muscle's role in shoulder movements like adduction and internal rotation, and its function as a breathing aid. The anatomical features, such as the fossa infra clavicularis, are also described.

What are the three areas into which the pectoralis major muscle is divided?

Describe the origin of the pars clavicular of the pectoralis major muscle.

What prevents the pectoralis major muscle from being overstretched?

What is the function of the pectoralis major muscle during shoulder joint movements?

Explain the role of the pectoralis major muscle as a breathing aid.