148 



THE SKELETON 



fraspinatus, and a lower for the teres minor. The lesser tuberosity is situated in 

 front of the head and is the more prominent of the two; it receives the insertion of 

 the suhscapularis. The furrow between the tuberosities lodges the long tendon 

 of the biceps and forms the commencement of the intertubercular (bicipital) 

 groove, which extends downward along the shaft of the humerus. Between the 

 tuberosities the transverse humeral ligament converts the upper end of the groove 

 into a canal. In addition to the long tendon of the biceps and its tube of synovial 



Fig. 



176. — The Left Humerus with a Supracondyloid Process and some Irregular 

 Muscle Attachments. (Anterior view.) 



Head- 



Lesser tuberosity 



Subscapularis" 

 Capsular ligament- 



Coraco-brachialis 

 humeri) 



brevis (RotatO!-_ 

 Intertubercular groove- 



Brachialis- 



Coraco-brachialis- 

 Supracondyloid process- 



I h 



Coraco-brachialis U ' ,( 'J 



f if 'J 

 Third head of biceps- 



Greater tuberosity 

 -Transverse humeral ligament 



■Fourth head of biceps 



-Rough surface for deltoid 



The lateral condylar ridge 



Pronator teres- 



Articular capsule 

 Coronoid fossa 



Medial epicondyle 



Olnar collateral ligament 



Trochlea 





Radial fossa 

 Lateral epicondyle 

 Capitulum 



membrane, the groove transmits a branch of the anterior circumflex artery. 

 Immediately })elow the two tuberosities the bone becomes contracted and forms 

 the surgical neck. 



The shaft or body [corpus humeri] is somewhat cylindrical above, flattened 

 and prismatic Ix'low. Three Ixjrtlers and thre(! surfaces may l^e recognised. 



Borders. - -The anterior border comincmces above at the greater tuberosity, 

 and its upper part, foriuiug the crest of this tuberosity [crista tuberculi majoris], 



