Pectoralis major: Origin, insertion, innervation,function - Kenhub
2023年11月3日 · The pectoralis major has a broad origin, based on which it is divided into three parts: clavicular part, sternocostal part and abdominal part. All three parts converge laterally and insert onto the greater tubercle of humerus. The main function of this chest muscle as a whole is the adduction and internal rotation of the arm in the shoulder joint.
Pectoralis Major: Origin, Insertion, Action, Innervation, Diagram
2023年5月5日 · The pectoralis major is a large, triangular, or fan-shaped superficial muscle lying at the anteriormost position in the chest cavity. It forms the front wall of the axilla, making up most of the chest and breast.
Pectoralis major - Wikipedia
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 .
Pectoralis major - Physiopedia
The function of the pectoralis major is 3-fold and dependent on which heads of muscles are involved. With the origin fixed, the pectoralis major adducts, medially rotates, and transversely adducts arm at glenohumeral joint. It assists in flexion of the arm (via its clavicular head)
Pectoralis major muscle | Radiology Reference Article - Radiopaedia.org
2024年6月24日 · Pectoralis major is a large, fan-shaped muscle. It covers much of the anterior chest wall. It is composed of two or three parts (depending on texts) named for their origins, with the sternocostal head forming the bulk (~80%) of the total muscle volume 8,9:
Pectoralis Major | UW Radiology - University of Washington
Pectoralis Major Origin: Clavicular head: anterior surface of medial half of clavicle; Sternocostal head: anterior surface of sternum, superior six costal cartilages, and aponeurosis of external oblique muscle
Pectoralis Major Muscle | Complete Anatomy - Elsevier
The pectoralis major muscle is a large fan-shaped muscle that originates medially from the sternum, superiorly from the medial half of the clavicle, and inferomedially from the aponeurosis of the rectus abdominis muscle along the cartilaginous portion of the sixth rib.
Pectoralis Major - The Definitive Guide - Biology Dictionary
2020年7月30日 · Specifically, it originates from the anterior part of the medial half of the clavicle. The sternocostal head originates from three sites: the anterior surface of the sternum (or the chest bone), the cartilage of the upper six ribs, and the aponeurosis of the external oblique muscle.
Pectoralis Major Muscle - Origin, Insertion, Action, 3D Model
2022年11月14日 · The pectoralis major muscle is a thick fan-shaped muscle which arises from the sternum and medial clavicle, inserting onto the lateral lip of the intertubercular sulcus of the humerus. Origin Medial 1/2 of clavicle
Pectoralis Major Muscle – Attachment, Action & Innervation
2022年10月13日 · Pectoralis major is a thick, fan-shaped muscle contributing to the thoracobrachial motion. It consists of a clavicular part and a sternal part, both converging to a flat tendon that inserts on the humerus. It's innervated by both medial and lateral pectoral nerves.