It arises from its medial two-thirds and from the lower two-thirds of the groove on the axillary border (subscapular fossa) of the scapula. Some fibers arise from tendinous laminae, which intersect the muscle and are attached to ridges on the bone; others from an aponeurosis, which separates the muscle from the teres major and the long head of the triceps brachii. The fibers pass laterally and coalesce into a tendon that is inserted into the lesser tubercle of the humerus and the anterior part of the shoulder-joint capsule. Tendinous fibers extend to the greater tubercle with insertions into the bicipital groove. Relations The tendon of the muscle is separated from the neck of the scapula by a large bursa, which communicates with the cavity of the shoulder-joint through an aperture in the capsule. The<unk>  is separated from the serratus anterior by the<unk>  (supraserratus) bursa. Nerve supply The<unk>  is supplied by the upper and lower subscapular nerves, branches of the posterior cord of the brachial plexus. (C5-C6)
Subscapularis muscle
Latissimus dorsi muscle
Deltoid muscle
Inferior oblique muscle
Superior oblique muscle
Levator palpebrae superioris muscle
Morcellator
Pectus