Download Physiology of the Joints (Upper Extremities) by I. A. Kapandji MD PDF

By I. A. Kapandji MD

This publication makes use of the visible procedure and illustrates the anatomy, body structure and mechanics of the joints through transparent and easy diagrams and at least textual content.

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Extra info for Physiology of the Joints (Upper Extremities)

Sample text

Abduction is also checked when the greater tuberosity comes into contact with the upper part of the glenoid and the glenoid labrum. This contact is delayed by lateral rotation, which pulls back the greater tuberosity near the end of abduction, brings the bicipital groove to face the acromiocoracoid arch and slackens slightly the inferior fibres of the gleno-humeral ligament. As a result abduction reaches 900 :1 f; ~ I C ~~ : During abduction (Fig. , C' ~ I I :( I'Ie'; ~( '{ I When abduction is combined with a 300 flexion in the plane of the scapula, the tightening of the gleno-humeralligament occurs more slowly and abduction can reach up to 1100 • ( During rotation (Fig.

58): - Upper part, running horizontally and anteriorly. It draws the scapula 12 to 15 cm anteriorly and laterally and stops it from moving back when a heavy object is being pushed forwards. If - ( (. '-- it is paralysed this action causes the medial edge of the scapula to leave the thoracic wall (used as a clinical test). ' -.. - Lower part, running obliquely, anteriorly and inferiorly. g. carrying a bucket of water). '-.. In Figure 59 (horizontal section): /" ( .. ( Left side shows the action of the trapezius (middle fibres) , levator scapulae and rhomboids.

Simultaneous contraction of the three bands draws the scapula medially and posteriorly; rotates the scapula superiorly (20°), playing a minor part in abduction but a major part in the carrying of heavy loads; prevents the arm from sagging and the scapula from leaving the thoracic wall. 2. Rhomboid muscles, running obliquely, superiorly and medially. They draw the inferior angle superomedially and so elevate the scapula and rotate it inferiorly with the glenoid cavity facing inferiorly; they fix the inferior angle of the scapula against the ribs and paralysis of the rhomboids is followed by separation of the scapulae from the thoracic wall.

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