Function. The primary actions of this muscle include the stabilization, depression, abduction or protraction, internal rotation and downward rotation of the scapula.
What is the function of the pectoralis major quizlet?
Pectoralis Major Function: Adducts and medially rotates the humerus, and draws the scapular anteroinferiorly. On its own the clavicular head flexes the humerus , and the sternocostal head extends it.
What is the difference between pectoralis major and minor?
Pectoralis minor moves from the back to the front of the body while pectoralis major moves from the outside to the inside in the front plane of the body. Unfortunately what often happens is that these muscles get glued together (a rolfing term) and begin to move as one unit.
What muscle is the pectoralis major?
The pectoralis major is the superior most and largest muscle of the anterior chest wall. It is a thick, fan-shaped muscle that lies underneath the breast tissue and forms the anterior wall of the axilla.
What is the function of the latissimus dorsi quizlet?
– Raises body toward arm during climbing.
Where does the pectoralis major insertion?
Insertion. The upper and lower fibers of pectoralis major insert to the crest of greater tubercle of the humerus. Upper fibers are more anterior and caudal on the crest, while posterior fibers twist on themselves and are more posterior and cranial than the upper fibers.
What is the latissimus dorsi action?
Functionally, the latissimus dorsi muscle belongs to the muscles of the scapular motion. This muscle is able to pull the inferior angle of the scapula in various directions, producing movements on the shoulder joint (internal rotation, adduction and extension of the arm).
What is the latissimus dorsi quizlet?
Latissimus dorsi Origin: Intertubercular sulcus of the humerus. Latissimus dorsi Insertion: Extends, adducts, and rotates arm medially at the shoulder.
Are latissimus dorsi and teres major synergist?
Teres major (TM) is a small muscle that runs along the lateral border of the scapula. It is one of the seven scapulohumeral muscles that act around the glenohumeral joint to facilitate shoulder movement. It’s sometimes called “lat’s little helper” because of its synergistic action with the latissimus dorsi.
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