76 Anatomy Applied to Medicine and Snrgety. 



above mentioned, flexors of the forearm as well, assisting 

 therefore, the biceps and brachialis anticus. Two muscles 

 from the outer condyle the supinator longus and the ex- 

 tensor carpi radialis longior have the same action of 

 flexion, the former to a marked, the latter to a slight de- 

 gree, while the rest of the muscles, that arise from the 

 external condyle, extend the forearm thus assisting the 

 triceps and the anconeus. 



Bloodvessels. The brachial artery divides into ulnar 

 and radial about half an inch below the centre of the 

 bend of the elbow, or, about one and one-quarter 

 inches below a point, midway between the two epicon- 

 dyles. The radial artery continues downwards the 

 direction of the brachial, whereas, the ulnar has a decided 

 curve inwards before passing vertically downwards. 



Relations of the Radial. As the radial passes down 

 the forearm it lies on the biceps, supinator brevis, flexor 

 sublimis, pronator radii teres, flexor longus pollicis, pro- 

 natur quadratus and the radius, and has in front, in ad- 

 dition to the superficial and deep fasciae, the inner margin 

 of the supinator longus. On the inner side are the pro- 

 nator radii teres above and the flexor carpi radialis below, 

 while, on the outer side, are the supinator longus muscle 

 and the radial nerve, the latter gradually approaching 

 the vessel from above. The venae comites of the radial 

 artery communicate with the superficial veins by means of 

 a short branch which pierces the deep fascia in the neigh- 

 borhood of the apex of the muscular triangle in front of 

 the elbow joint. 



Relations of the Ulnar. The ulnar artery lies on the 

 brachialis anticus and on the flexor profundus digitorum, 

 and, since the curved part of the artery lies beneath the 

 superficial flexors, these muscles, along with the super- 

 ficial and deep fasciae, lie in front of the artery and so 



