1152 



SURGICAL AXD TOPOGRAPHICAL AXATOMY 



To trace the synovial membrane of the shoulder-joint is a comparatively 

 simple matter (fig. 715). Covering both aspects of the free edge of the glenoid 

 ligament, it lines the inner aspect of the capsule whereby it reaches the articular 



Fig. 714. — Sectiox through the Middle of the Right Upper Arm. 



( Heath. ) 



Cephalic vein 



Ml'SCULO-CVTANEOUS 

 NERVE 

 Bracbialis anticus 



MUSCULO-SPIRAL NERVE 



Superior profunda vessels 



Triceps, with fibrous intersection 



Biceps 



Brachial vessels 



MEDIAN NERVE 

 ULNAR NERVE 



Basilic vein, iiith internal 

 cutaneous nerves 



Inferior profunda vessels 



margin of the head of the humerus; there is a distinct reflection, below, from 

 the capsule on to the humeral neck before the rim of the cartilage is reached. 

 An extensive protrusion of synovial membrane takes place in the fonn of a synovial 

 bursa, at the inner and anterior part of the capsule, near the root of the coracoid 



Fig. 



715. — Diagrammatic Sectiox of Shouldee through Bicipital Gkoove. 



(Anderson.) 



Deltoid 



SUBACROMIAL BURSA 



CAPSULE OF SHOULDER-JOINT 

 Long tendon of biceps 



Synovial membrane lining 

 oap3ul3 and synovial 

 membrane 



Extra-articular portion of 

 biceps tendon 



Glenoid ligament 



GLENOID CAVITY 



Glenoid ligament 



Inner fold of capsule and 

 synovial membrane 



process under the tendon of the subscapularis. Another jirotrusion takes place 

 between the two tul)erosities along the bicipital groove, as low as the insertion of 

 the pectoralis major. A third synovial protrusion may be seen, but not frequently, 

 at the outer or posterior aspect, in the form of a bursa, under the infraspinatus 



