WebFeb 14, 2024 · Or simply, the pecs. The pectoralis major has a wide, fan-shaped origin, and is generally divided into two parts: The sternocostal part is the larger, lower portion, which originates mainly from your sternum (and to a degree, from … Web1) CHEST MUSCLES ANATOMY The pectoralis major muscle is made up of 3 parts whose fibers run in different directions. That’s because they originate from different areas on the clavicle and sternum. The Upper Chest fibers originate from the clavicle and run toward the humerus. They go upward in a diagonal toward the center of the chest.
Pectoralis Major: Anatomy, Function, and Treatment - Verywell …
WebAug 15, 2024 · the intercostal perforators arising from the internal thoracic artery provide a segmental blood supply. the blood supply that provides circulation to this muscle perforates through to the breast, thus also providing its blood supply Innervation WebInnervation of the Pectoralis Major Both the lateral and medial pectoral nerves, nerves that are branches of the brachial plexus, provide motor innervation to the PM muscle. The lateral pectoral nerve arises from the lateral cord of the brachial plexus and is composed of branches of C5, C6, and C7. port 113 used for
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WebApr 5, 2024 · Citation, DOI, disclosures and article data. The pectoralis minor muscle is a muscle of the pectoral region lying deep to and completely covered by the pectoralis major muscle . It is an important anatomical landmark in two senses: it arbitrarily divides the axillary artery into 3 parts. it arbitrarily divides the axillary lymph nodes into 3 ... WebMar 18, 2015 · Teres major: This muscle helps rotate the upper arm. Serratus anterior: Located in the rib cage, this muscle keeps the shoulder blade against the chest wall and helps rotate the shoulder blade ... WebThe muscles of the chest and upper back occupy the thoracic region of the body inferior to the neck and superior to the abdominal region and include the muscles of the shoulders. These important muscles control many … irish irish rail