ARTICULA TIONS. LIGAMENTS. 



429 



6. Through what osteological points 'would a fracture of the surgical neck of tlic 

 scapula pass ? 



(i) Through the suprascapular notch ; (2) through the scapular notch ; (3) 

 through the fourth scapular angle or the deepest part of the subscapular fossa. 



Tell where tJie ligaments are found by which the scapula and clavicle arc held 

 together. 



THE SCAPULO-CLAVICULAR UNION. 



1. Between the acromion process of the scapula and the clavicle. 



2. Between the coracoid process and the clavicle. 



3. Between certain given parts of the scapula alone. (Fig. 298.) 



Transverse ligament 



Conoid ligament 



Acromio-clavioular 

 ligament 



Tendon of infra- 

 spinatus and teres 

 minor 



Inferior transverse 

 or spino-glenoid 

 ligament 

 Capsule of shoulder 



FIG. 298. POSTERIOR VIEW OF THE SHOULDER-JOINT, SHOWING ALSO THE ACROMIO- 

 CLAVICULAR JOINT AND THE PROPER LIGAMENTS OF THE SCAPULA. 



THE ACROMIO-CLAVICULAR ARTICULATION. 



1. Class. Diarthrosis, because of capsule, synovia, and motion. 



2. Subdivision. Arthrodia, because of gliding, simple movement. 



3. Technical Name. Acromio-clavicular articulation. 



4. Osteological Units. Clavicle and scapula. 



5. Subdivisional Parts. Acromion and acromial end of clavicle. 



6. Articular Surfaces. Acromial of clavicle, clavicular of acromion. 



7. Basis. A capsule lined by synovial membrane. 

 Subdivisions of Capsule. Superior and inferior, by some authors. 

 Strengthening Bands. None. Purely periosteal. 

 Incorporation of Tendons. None. 



Limitation of Motion by Bone. None. 

 Ligaincntous Muscles. Deltoid and major pectoral. 

 Nerve-supply. The circumflex. 

 14. Blood-supply. Circumflex, acromio-thoracic. 



8 



9- 

 10. 

 1 1. 



12. 

 13 



