Ebook Concise human anatomy (2/E): Part 2
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Ebook Concise human anatomy (2/E): Part 2
IntroductionThe upper limb accounts for 5% of (he body weight. The movements of the clavicle and scapula, humerus, radius, ulna and wrist have one col Ebook Concise human anatomy (2/E): Part 2llective purpose lo pul the hand into the desired position for whatever it is required to do. Since the limb is essentially suspended from the trunk of the body mainly by muscles and not by a large joint, it has great freedom of movement.1 he small sternoclavicular joint is the only bony connection Ebook Concise human anatomy (2/E): Part 2between the upper limb and the axial skeleton (Figs. 4.1, 4.4A, 5.3). All other connections are muscular, mainly pecloralis major anteriorly, serratusEbook Concise human anatomy (2/E): Part 2
anterior laterally and trapezius and latissimus dorsi posteriorly (Figs. 4.2. 4.3), accounting for the great mobility of the shoulder girdle comparedIntroductionThe upper limb accounts for 5% of (he body weight. The movements of the clavicle and scapula, humerus, radius, ulna and wrist have one col Ebook Concise human anatomy (2/E): Part 2st wall.Shoulder, axilla and armBony prominences - the clavicle (Figs. 4.1, 4.4A, 5.3) is palpable throughout its length and can be traced from the sternoclavicular joint to its lateral end. where it makes the acromioclavicular joint with the acromion, which is at the lateral end of the spine of the Ebook Concise human anatomy (2/E): Part 2 scapula. 1 he acromion lies al a slightly lower level than the clavicle: on palpation there is a small ’step down’ from clavicle to acromion. The tipEbook Concise human anatomy (2/E): Part 2
of the coracoid process of the scapula is just deep to the anterior border of the deltoid and can be fell by pressing laterally in the dcllopcc-toralIntroductionThe upper limb accounts for 5% of (he body weight. The movements of the clavicle and scapula, humerus, radius, ulna and wrist have one col Ebook Concise human anatomy (2/E): Part 2 sternum, the capsule encloses two joint cavities because a fbro-cartilaginous disc separates the two bones. Adjacent to the joint is the costoclavicular ligament, which passes from the fist rib and costal cartilage to the inferior surface of the clavicle, and is important as the fulcrum about which Ebook Concise human anatomy (2/E): Part 2 movements of the clavicle lake place.Shoulder (glenohumeral) joint position is maintained lateral to the side of the trunk by the clavicle, giving itEbook Concise human anatomy (2/E): Part 2
freedom to be the most mobile of all body joints.102Chapter 4Upper limbFig. 4.1 Surface features of the upper trunk and upper limb, from the front (fIntroductionThe upper limb accounts for 5% of (he body weight. The movements of the clavicle and scapula, humerus, radius, ulna and wrist have one col Ebook Concise human anatomy (2/E): Part 2Fig. 4.4). There is a capsule, but the main factor keeping the bones in place is the coracoclavicular ligament, which runs from the coracoid process of the scapula to the inferior surface of the clavicle near its lateral end and consists of two parts, the conoid and trapezoid ligaments. These are st Ebook Concise human anatomy (2/E): Part 2rong and highly important in maintaining the integrity of the joint.In dislocation, they are torn and the ‘step down' from clavicle to acromion is marEbook Concise human anatomy (2/E): Part 2
kedly increased. Clinically this is 'shoulder separation'.Pectoralis major - from the medial half of the clavicle (clavicular head), upper 6(7) costalIntroductionThe upper limb accounts for 5% of (he body weight. The movements of the clavicle and scapula, humerus, radius, ulna and wrist have one col Ebook Concise human anatomy (2/E): Part 2or. adductor and medial rotator of the shoulder joint and innervated by the medial and lateral pectoral nerves.Pcctoralis minor small and lying deep to pectoralis major, passing from ribs 3. 4 and 5 to the coracoid process of the scapula (Fig. 4.2). It helps to fx the scapula to the anterior chest w Ebook Concise human anatomy (2/E): Part 2all. Il is important as a landmark in the axilla (see below).Serratus anterior from the upper eight ribs anlcrolaterally (Fig. 4.2) fbres converge aloEbook Concise human anatomy (2/E): Part 2
ng the length of the medial border of the scapula, but half of them are concentrated on the inferior angle to assist in lateral rotation of the scapulIntroductionThe upper limb accounts for 5% of (he body weight. The movements of the clavicle and scapula, humerus, radius, ulna and wrist have one col Ebook Concise human anatomy (2/E): Part 2lRectus abdominis and tendinous intersectionAnterior superior iliac spineExternal oblique aponeurosisPubic tuberclePubic symphysisClavicleDeltoidCephalic veinManubriosternal jointPecloralis majorSerratus anteriorRectus sheathExternal obliqueInguinal ligament Ebook Concise human anatomy (2/E): Part 2IntroductionThe upper limb accounts for 5% of (he body weight. The movements of the clavicle and scapula, humerus, radius, ulna and wrist have one colGọi ngay
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