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There are many muscles of the shoulder All those different bones together make it. the shoulder The joints include the humerus, scapula, and clavicle. The muscles Together they form the outer circumference of the armpit. and shoulder . They help the shoulder The joints move in a wide range of motion and provide defensive support. the shoulder Links. This article discusses them muscles and explain their functions in detail.
The Three Muscle Groups of the Shoulder
Shoulder muscles There are three separate groups of muscles. They include the superficial muscles or “extrinsic muscles “, the deep muscles or “intrinsic muscles “, and the muscles that involve both the shoulder and arms. The different muscle The different groups are described directly.
1. superficial or external muscles
These include muscles :
Pectoralis major muscle . This muscle help ensure support and movement of the forehead area. the shoulder PaulOne includes two separate heads. The clavicle head is located on the middle half of the clavicle, and the sternocostal head is located in the area of the breastplate. The muscle This engages the humeral lobe, pulling the arm inward and allowing the glenohumeral joint to flex and rotate medially.
Trapezius muscle . This is a large muscle It emerges from the back of the skull and follows most of the vertebrae. It continues up to the clavicle, the acromion of the scapula, and the spine of the scapula. Strong. muscle that raises the shoulder Rotation of the scapula allows for upward movement.
Latissimus dorsi muscle . This muscle It begins at the spinous process of the lower thoracic spine and also at the iliac crest of the pelvis and lower ribs. It inserts into the interosseous groove of the humerus. It helps to anchor the arm to the trunk and rotate the arm medially. He also interferes the shoulder Then the lower lobe of the scapula is placed against the chest wall.
Deltoid muscle . It gives the shoulder Composition and very strong muscle of all the muscles of the shoulder field has three parts: the anterior, medial, and posterior lobes. The anterior lobe arises from the anterior and superior part of the clavicle. The middle lobe arises from the acromion process, and the posterior lobe arises from the lower part of the spine at the scapula. The various lobes all come together to insert into the humerus. Together they bend and rotate the arm inward, insert the arm into the corpus callosum, and pull the arm out again. This helps to lift the arm as it is moved away from the side of the body.
2. deepest or internal muscles
This group includes many weight-bearing muscles. muscles of the shoulder as listed below:
The front muscles velddit contains a minor. muscle It is quite small. muscle It is deep in comparison to the larger breast muscles. muscle The field contains the third to fifth rib bones, which extend to the Coracoidus Processus of the scapula. This helps to lift the scapula back and forth and helps to inspire in lifting the rib bones. subclavius muscle also deep to the size of the thoracic measure. muscle The pole this comes from the rib bone first and connects to the clavicle. the shoulder It moves down so that the stability of the clavicle is protected.
The back muscles These include the raised scapula. muscle The large and small romboideus muscles and the large tele muscle Taxolateral scapula muscle Beginning at the vertebrae in the neck, it attaches to the upper and medial portion of the actual scapula so that it rises.Rhomboo muscles Starts from the vertebrae and leaves the medial lobes from the scapula. This means that the scapula may be elevated.Tecea Major muscle Begins at the bottom of the scapula and adheres to the front of the flood. This helps to extend and rotate the arm medially.
The side muscles The poles involve the frontal serratus. muscle It comes from the first nine rib bones, runs around the chest wall, and adheres to the medial side of the scapula. This helps to lift the scapula forward along the bony wall and rotate the scapula.
The rotator cuff muscles . These are four muscles that help the shoulder The joint is stable. Made from super pinatus. muscle , the infraspinatus muscle Minor. muscle There is also a subscapularis. muscle This creates a subcutaneous posterior wall that intervenes at the humeral tuberosity. They help to turn the arm inward and stabilize it. the shoulder joint itself.
3. shoulder and arm muscles.
These include muscles :
The biceps brachii muscle The belders are two cups. The long head is attached to the muscular enveloping tubercle of the scapula, and the short head comes from the stitching of both the collacoid process of the scapula and the medial nuance of the forearm. The muscle It helps to bend the forearm and shoulder as well.
Coracobrachial muscle This comes from the Coracoidus Processus of the scapula and can be added along the humerus to help the arm in hull interest. It also lines up with the humerus.
Triceps muscle The triceps have three cups: one head is at the top of the upper part of the scapula on the bacterial nature of the two scapulae, and the last half is on the lower half of the humerus. They end in the process of elplanon elecranon. It is responsible for extending the forearm of the elbow. It still has the opportunity to breathe the humerus in the cadaver and help spread the arm.
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