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The subscapularis muscle forms the majority of the posterior wall of the axilla, facing the contents of axilla with its anterior surface. Serratus anterior covers its superolateral part, while he coracobrachialis and biceps brachii muscles lie over its inferomedial part.
The subscapularis is a large, triangular shoulder muscle on the outer side of the upper back. The muscle gets its name from its location under the scapula, as ‘sub’ means ‘under’ and ‘scapularis’ refers to the scapula or shoulder blade.
The subscapularis muscle is a large triangular shaped muscle that originates from the subscapular fossa. The term "subscapularis" means under (sub) the scapula (wingbone). It is the largest, strongest part of the four rotator cuff muscles, the other three are the supraspinatus , infraspinatus and teres minor muscles.
Attachments of Subscapularis Muscle: Origin & Insertion. Origin: (proximal attachments) Subscapular fossa of the scapula. Insertion: (distal attachments) Lesser tubercle of humerus. Check out this expert guide on learning the anatomy of the arm and shoulder muscles (step-by-step walkthrough).
Origin. The Subscapularis originates from the subscapular fossa, which is the concave surface on the costal (anterior) side of the scapula (shoulder blade). This broad origin covers almost the entire area of the subscapular fossa, giving the muscle a large and flat appearance at its beginning.
The subscapularis muscle is innervated by the lower and upper subscapular nerves. The subscapularis muscle is the most-used muscle in the shoulder. It is the primary muscle used in...
The subscapularis is an intrinsic muscle of the shoulder region. It is part of the rotator cuff muscle group. Attachments: Originates from the subscapular fossa (anterior surface of the scapula). It attaches to the lesser tubercle of the humerus. Actions: Medial rotation of the arm; Innervation: Upper and lower subscapular nerves.
Origin. It arises from its medial two-thirds of the costal surface of the scapula, the intermuscular septa (which create ridges upon the scapula), [1] and the lower two-thirds of the groove on the axillary border (subscapular fossa) of the scapula. [citation needed]
Quick Facts. Origin: Subscapular fossa of scapula. Insertion: Lesser tubercle of humerus. Action: Medially rotates and stabilizes arm at glenohumeral (shoulder) joint. Innervation: Upper and lower subscapular nerves (C5-C7). Arterial Supply: Subscapular, suprascapular, and lateral thoracic arteries. Complete Anatomy.
Origin and Insertion: The subscapularis muscle is one of the four muscles that make up the rotator cuff in the shoulder. It originates from the subscapular fossa, a concave depression on the anterior (front) surface of the scapula (shoulder blade).