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The pectoralis major (from Latin pectus 'breast') is a thick, fan-shaped or triangular convergent muscle of the human chest. It makes up the bulk of the chest muscles and lies under the breast . Beneath the pectoralis major is the pectoralis minor muscle .
If you love chest workouts, or sit hunched over a computer all day, your chest may be tight. Here are the 4 best chest stretches to loosen up.
The pectoralis major, the larger of the two chest muscles, is responsible for movements such as pushing, lifting and rotating the arm. Exercises like pushups , chest presses and chest flys ...
The push-up requires the work of many muscle groups, with one of the primary muscle groups being the chest muscles, the pectoralis major and the minor. [7] These are the two large chest muscles and the main pushing muscle group of the upper body. When pushing and lowering the body during a push-up, the pectoralis major is doing most of the work.
Sternoscapular fasciculus to the upper border of scapula. Sternoclavicularis [3] from manubrium to clavicle between pectoralis major and coracoclavicular fascia. [1] Rarely, the subclavius may be missing entirely. [4]
The clavipectoral fascia (costocoracoid membrane; coracoclavicular fascia) is a strong fascia situated under cover of the clavicular portion of the pectoralis major. It occupies the interval between the pectoralis minor and subclavius, and protects the axillary vein and artery, and axillary nerve. [1]
Pectoralis minor is a thin, triangular muscle located beneath the pectoralis major. It attaches to the ribs, and serves to stabilize the scapula, the large bone of the shoulder. The pectoral fascia is a thin layer of tissue over the pectoralis major, extending toward the latissimus dorsi muscle on the back.
[3] [6] Convergent muscles, such as the pectoralis major in humans, have a weaker pull on the attachment site compared to other parallel fibers due to their broad nature. These muscles are considered versatile because of their ability to change the direction of pull depending on how the fibers are contracting.