SHOULDER, ARM, /-YM'AV/AM/, AND HAND. 



the flexor carpi radialis, the- palmaris longus, flexor sublimis digitorum, and turn 

 them aside, but do not injure the nerves and vessels to the same. Find the 

 ulnar artery, and you will sec it passes behind all these three muscles. Non- 

 trace it a little further, and see it pass behind the flexor sublimis di^itorum and 

 median r ner\v. Mere you will find it has reached the ulnar groove. Remem- 



Capsular ligament 

 Internal lateral ligament 



Tubercle for the flexor nublimia 



difcltoruin 

 Internal lateral ligament 



Brachialls anticua 

 Pronator radii tcres 'lesser head}- 



Flexor longus pollicla (.acocaaory head)- 



GREATER SiGMOID FOSSA 



HEAD Of RADIUS 

 NECK Of RADIUS 

 Lower limit of orbicular ligament 



Oblique ligament 



BICIPiTAL TUBERCLE 



Oblique ligament 



Supinator brevia 



Flexor sublimia digitoruui 



Intcroaaeoua membrane 



Flexor profundua digitorum 



Fronator quadratus 



Anterior radio-ulnar ligament . 

 Internal lateral ligament 



OBLIQUE LINE 

 - RADIUS 

 . Pronator radii terea 



Flexor longus pollioia 



Supinator !ongua 

 External lateral ligament 



luterartioular flbro-oartilage Anterior radio-carpal ligament 



Fu;. 124. THK LEFT ULNA AND RADIUS. (Antero-internal view.) 



her the course.: behind the median nerve and all the muscles originating from 

 the inner condylc, except the flexor carpi ulnaris. 



The radial's course (Fig. 117): You will find it very superficial. It begins 

 at the bifurcation of the brachial artery in the cubital fossa. Now demonstrate 

 the fact that this artery lies on: (i) Biceps tendon; (2) Supinator brevis ; (3) 

 flexor sublimis digitorum ; (4) pronator radii teres ; (5) flexor longus hallucis ; (6) 

 pronator quadratus. These structures form the floor of the radial groove. 



The flexor sublimis digitorum (Fig. 122) is brought into view by turning 



