The ulnar muscle (m.anconeus) is triangular in shape, starting at the posterior surface of the lateral shoulder oath; is attached to the lateral surface of the elbow, the posterior surface of the proximal ulna and to the fascia of the forearm.
The triceps brachii muscle (m.triceps brachii) is thick, occupies the entire posterior surface of the shoulder, has three heads. The lateral and medial heads begin on the humerus, and the long ones on the shoulder blade.
The brachial muscle (m.brachialis) begins on the lower two thirds of the humerus body between the deltoid tuberosity and the joint joint capsule of the elbow joint, on the medial and lateral intermuscular septum of the shoulder.
The biliary-brachial muscle (m.coracobrachialis) begins at the apex of the coracoid scapula of the scapula, passes into a flat tendon that attaches to the humerus below the crest of the small tubercle at the level of the tendon attachment of the deltoid muscle.
The muscles of the shoulder are divided into two groups according to the topographic and anatomical principle: the anterior (flexor) and the posterior (extensors). The anterior group consists of three muscles: the coracoid-brachial, the biceps arm muscle and the brachial muscle; the back is the triceps brachii muscle and the elbow muscle.
The subscapular muscle (m. Subscapularis) is broad, thick, triangular in shape. It occupies almost the whole rib surface of the scapula. Has a fleshy origin on the surface of the subscapular fossa and lateral margin of the scapula.
The small round muscle (m.terpes minor) begins on the lateral margin of the scapula and the subacute fascia; is attached to the lower area of the large tubercle of the humerus.
The muscular muscle (m.supraspinatus) is located in the paranasal fossa. It begins on the back surface of the scapula above the scapula and on the supragastric fascia. The bundles extend laterally.
The deltoid muscle (m.deltoideus) is located superficially, directly under the skin, covers the shoulder joint from the lateral side, front, top and back, forms a characteristic roundness of the shoulder).
