The superficial layer of muscles of the chest
Subclavian muscle (m. subclavius), cutting, shifting his collarbone down and inwards, holding it in grudinoklyuchichnom joint. For a fixed position raises the shoulder girdle edge I, serving as an auxiliary respiratory muscles. The small and oblong in shape subclavian muscle below the clavicle, going almost parallel to it. The point of the beginning of the muscle are bone and cartilage ribs I, and place attachment - the lower surface of the acromion clavicle. Subclavian muscle of the pectoralis major muscle is covered.
|In Fig. 104.
Superficial muscles of the chest side view
1 - sternocleidomastoid muscle;
2 - deltoid;
3 - trapezius muscle;
4 - triceps brachii;
5 - infraspinatus muscle;
6 - a small circular muscle;
7 - pectoral muscle;
8 - a large circular muscle;
9 - serratus anterior;
10 - latissimus dorsi;
11 - external oblique muscle of abdomen;
12 - aponeurosis external oblique abdominal muscles
Pectoral muscle (m. pectoralis major) leads and drives the humerus inwards, the horizontal position of your hands down her, pushing forward and inward, and at a fixed position of the hands involved in the act of breathing ( breath), expanding the chest and lifting the edge. This broad muscle is located in peredneverhney of the chest and restricts the front axillary fossa. The muscle begins at the inner half of the clavicle, the anterior surface of the handle and body of sternum, cartilage of five or six upper ribs and the front wall of the fibrous sheath the rectus abdominis muscle. Pectoral muscle is attached to the crest of a large tubercle of humerus.
Pectoralis minor (m. pectoralis minor) moves the shoulder girdle forward and down, in a fixed position of the scapula elevates ribs. This flat triangular muscle is also concealed by the pectoralis major muscle. Its start point is located at the attachment of bone and cartilage parts of III-V edges. As it rises, muscle bundles come together and attach to the scapula coracoid process.
Serratus anterior (m. serratus anterior) moves the scapula forward and outward, pulling it from the spinal column, and also participates in the rotation of the scapula when lifting arm to the vertical position. Together with the rhomboid muscle locks the blade, pressing it to the surface of the chest. This broad flat muscle located in the anterolateral division of the chest wall. The upper portion of the pectoralis major muscle is covered. Muscle starts on the outer surface of eight or nine upper ribs and the tendinous arch between I and II of the ribs. The place of attachment are the medial edge of the blade and the bottom corner.
a., aa. — arteria, arteriae (artery, the artery)
lig., ligg. — ligamentum, ligamenta (ligament, the ligaments)
m., mm. — musculus, musculi (muscle, the muscle)
n., nn. — nervus, nervi (nerve, the nerve)
r., rr. — ramus, rami (branch)
s. — seu (or)
v., vv. — vena, venae (vienna)