ARTICULATIONS AND LIGAMENTS. 



121 



The superior acromio-clavicular, connect the adjoining parts 

 of the superior surfaces of the clavicle and acromion process; 



Inferior acromio- clavicular, connecting the inferior sur- 

 faces ; 



G or aco- clavicular, consists of two parts : 



Trapezoid, broad, square, arises from upper surface of cora- 

 coid process, and is inserted into oblique line on under surface 

 of clavicle ; and 



Conoid, behind and internal, arises from base of coracoid 

 process, and is inserted into conoid tubercle on under side of 

 clavicle and a line internal to it. 



FIG. 90. 



1, superior acromio-clavicular ligaments; 2, coraco-clavicular liga- 

 ments; 3, coraco-acromial ligaments; 4, transverse ligament; 5, 

 capsular ligament; 6, coraco-humeral ligament; 7, tendon of biceps. 



The capsular ligament covers the anterior and posterior sur- 

 faces of the joint, uniting above and below with the superior 

 and inferior acromio-clavicular ligaments. 



The arteries are from anterior circumflex, acromial thoracic, 

 and supra-scapular. 



Tlie nerves are anterior circumflex and supra-scapular. 



The scapula has, also, 



The coraco-acromial, arising from the outer border of the 

 mracoid process and inserted into the summit of the acromion, 

 and 



Transverse, a ligamentous band bridging the supra-scapular 

 notch, converting it into a foramen for supra-scapular nerve. 



