of superior‚ middle and inferior fibers). 0: 1: A: EOP‚ medial 1/3 of superior nuchal line‚ ligamentum nuchae‚ spinous processes of C7-Tl2. Lateral 113 of clavicle‚ acromion process‚ spine of the scapula elevates the scapula‚ depresses scapula‚ rotation of the scapula superiorly‚ retracts the scapula spinal accessory nerve (CN XI) and ventral rami C3-C4 (sensory) N: Latissimus dorsi 0: 1: A: N: thoracolumbar fascia‚ spinous processes ofT7-L5‚ iliac crests intertuburcular groove of the humerus
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Anatomically‚ it appears to be made up of three distinct sets of fibers though electromyography suggests that it consists of at least seven groups that can be independently coordinated by the central nervous system. * Origin: upper clavicle‚ scapula * Insertion: upper humerus ------------------------------------------------- Trapezius The superior or upper fibers of the trapezius arise from the external occipital protuberance‚ the medial third of the superior nuchal line of the occipital
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allows circular motion and hinge movement. The rounded head or ‘ball’ of the humerus rests in the shallow dish shaped cavity or ‘socket’ created by the glenoid fossa of the scapula. This allows for a wide range of motion around several axes. There are two main bones that make up the shoulder joint‚ the humerus and the scapula. The ball of the humerus is stabilized and cushioned by cartilage around the glenoid fossa socket. Ligaments connect the bones together and tendons then connect those bones
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and it can be easily injured. For example‚ people can suffer instability of the glenohumeral joint by posture‚ sports‚ or normal due to aging. Shoulder joint has multiple bones‚ ligaments‚ tendons and muscles to maintain equilibrium. The bones are scapula‚ humerus‚ clavicle and sternum. Moreover‚ these bones have muscles to balance strength for the shoulder joint‚ which are: pectoris minor‚ biceps‚ S.I.T.S. (supraspinatus‚ infraspinatus‚ teres major and minor‚ and subscapularis). In addition‚ there
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joint (ball and socket) it is freely moveable‚ nearly in all directions it is unstable joint (easily dislocate)‚ as the head of humerus articulate with glenoid cavity of scapula a bit shallow‚ so‚ it is compensated by rotator cuff muscles‚ tendons‚ ligaments‚ and the glenoid labrum. BONE OF SHOULDER JOINT 1) Clavicle 2) Scapula 3) Humerus
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Evaluate how the name of a muscle can distinguish its location‚ action‚ shape‚ and function. Select five different muscles to make this distinction. Descriptive terms are used to name skeletal muscles. Some names give the location in the body. The temporalis muscle is attached to the temporal bone in the skull. The brachialis muscle is attached to the humerus bone‚ but brachial refers to the main artery in the arm. Some muscles are named for their origins and insertions‚ like the genioglossus
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injury has already been done there are both surgical and physical therapeutic ways to treat these injuries. The most common two shoulder injuries include rotator cuff tear‚ and shoulder separation. A rotator cuff connects the humerus to the scapula‚ the tendons attach the muscle to the bones‚ and the muscle move the bones by pulling on the tendons. It helps raise and rotate the arm. Constant strain on the rotator cuff tendons‚ cause them to wear thin and develop tears over time. The causes of
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Infraspinatus‚ Teres Minor‚ and the Subscapularis. These hold the head of the humerus into the scalpula. Injuries to the rotator cuff are very common. The four muscles of the rotator cuff are the Supraspinatus‚ which originates above the spine of the scapula and inserts on the greater tuberosity of the humerus. This muscle abducts the shoulder joint and also helps stabilize the head of the humerus in the glenohumeral joint. The second muscle is the Infraspinatus‚ which originates below
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molecule in order to become ATP and this happens through hydrolysis. This ATP can be used in the muscle contraction and relaxation. 2. When one flexes his/her arm‚ the muscle on top is the bicep. The origin of the bicep is at the tubercule of the scapula and the insertion is at the bursa. The tricep is the muscle that is at the bottom of your arm. The origin is at the humerus and the insertion is into a white tendon that is attached to the ulna. 3. Antagonistically‚ referring to the bicep and tricep
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bone) and a SCAPULA (shoulder blade). Anteriorly‚ the medial end of each clavicle joins the CLAVICULAR NOTCH on the MANUBRIUM of the sternum (FIG. 7.23‚ p. 196). The lateral end of each clavicle meets the ACROMION of the scapula. The clavicle is a long bone‚ but it has no medullary cavity. The clavicle supports the scapula and arms‚ it protects deeper structures (blood vessels‚ for example) in the upper chest‚ and it transmits impact from the arms to the axial skeleton. The scapula is attached
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