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Pectoralis minor muscle (/ ˌ p ɛ k t ə ˈ r æ l ɪ s ˈ m aɪ n ər /) is a thin, triangular muscle, situated at the upper part of the chest, beneath the pectoralis major in the human body. It arises from ribs III-V; it inserts onto the coracoid process of the scapula. It is innervated by the medial pectoral nerve.
The five muscles that comprise the function of the shoulder girdle are the trapezius muscle (upper, middle, and lower), levator scapulae muscle, rhomboid muscles (major and minor), serratus anterior muscle, and pectoralis minor muscle. [3] The shoulder girdle consists of the clavicle and the scapula, which serve to attach the upper limb to the ...
The muscles that are attached are: Pectoralis Minor, Coracobrachialis, and Biceps Brachii. In addition, this structure attaches all the tendons and ligaments together. There are two purposes for this structure: it is the primary hold by which the clavicle is joined to the scapula and alongside the acromion and coraco-acromial tendon, it shapes ...
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. Along with the pectoralis major and ...
Other long muscles such as pectoralis major, latissimus dorsi, teres major and deltoid muscles also provide support to the shoulder joint. [ 4 ] The tendons of the rotator cuff and their respective muscles ( supraspinatus muscle , infraspinatus , teres minor , and subscapularis ) stabilize and fix the joint. [ 4 ]
Movements of the shoulder joint. [1] Movement Muscles Origin Insertion Flexion (150°–170°) Anterior fibers of deltoid: Clavicle: Middle of lateral surface of shaft of humerus: Clavicular part of pectoralis major: Clavicle Lateral lip of bicipital groove of humerus Long head of biceps brachii: Supraglenoid tubercle of scapula
The opposite motion of scapular retraction. The scapula is moved anteriorly and laterally along the back, moving the arm and shoulder joint anteriorly. If both scapulae are protracted, the scapulae are separated and the pectoralis major muscles are squeezed together. [11] serratus anterior (prime mover), pectoralis minor and major Scapular ...
Teres minor), 15. Biceps muscle. The rotator cuff (SITS muscles) is a group of muscles and their tendons that act to stabilize the human shoulder and allow for its extensive range of motion. Of the seven scapulohumeral muscles, four make up the rotator cuff. The four muscles are: supraspinatus muscle; infraspinatus muscle; teres minor muscle