Muscle that lifts the shoulder, internal (M. Levator Humeri Internus)

Human muscles. The internal levator humerus muscle. (lat. Musculus levator collum humeri interni) (sometimes erroneously called the minor infraspinatus muscle)

The muscle lifts and rotates the shoulder, and also flexes the forearm and hand. Before the capsule of the shoulder joint is formed, the muscle goes to it in the form of a tendon thread, attaching from above to the supraglenoid tubercle of the scapula. The anterior end of the muscle forms a hook (deltoid process) with the coracoid process of the condyle of the humerus, which attaches the muscle to the upper part of the humerus. The m. begins along the posterior edge of the acromion and is attached with its distal end to the anterior wall of the deltoid-subscapular groove of the scapula. Between the gluteus medius and minimus muscles and the superficial fascia of the anterior abdominal wall there is a triangular slit-like notch - the subscapularis fossa, into which the lower edge of the muscle enters. Near this confluence there is a groove connecting the axillary cavity with the subscapular fossa.

At the beginning of its path in the upper limb, the femoral head of the abductor muscle passes next to the head of the biceps brachii muscle. B.K. S. Sheinis recommends calling the next biceps muscle the “abductor minor” to avoid confusion. The accessory capitis, the suprasternalis running horizontally, and the pectoralis major arise from the posterior brachialis at the same location as the abductor minor. The clavicular muscles underlying the major and latissimus dorsi form the triangular tendon of the abductor minor muscle and rise above it. Additionally, the abductor minor muscle is a plantaris muscle that separates the lateral surface of the big toe from the little toe. The intermuscular muscle of the deltoid muscle is supplied with blood from the lateral scapular arteries, arising from the arch of the brachiocephalic trunk, and the dorsal muscular artery, passing between the dorsal surface of the deltoid and the small transverse process of the anterior scalene muscle. The name intermuscular trunk comes from the Latin word for biceps trunk.

The axillary nerve gives interosseous nerves to the muscles of the arm. The ulnar nerve passes through the interscapular canal and the spinal nerve of the axillary foramen. These structural features, and especially the presence of a spinal nerve, described in 1898 as an intermuscular jet. Razgiblingen is the innervating nerve of the ulnar nerve. The depressor palmaris and subclavian tendons pass above the wrist above the other tendons, forming the most prominent part of the muscle during shoulder elevation.