1156 



SURGICAL AXD TOPOGRAPHICAL AXATOMY 



ing septum. The external condyle is more rounded, and thus less promineni; below, 

 and a little behind it, the head of the radius can be felt moving under the capi- 

 tellum when the forearm is supinated and flexed. A depression marks this si)ot 

 and corresponds to the interval between the anconeus and brachio-radialis and 

 exterior carpi radialis longior; at the back, the upper part of the olecranon is 

 covered by the triceps. The lower is subcutaneous, and separated from the skin 

 by a bursa. If the thumb and second finger be placed on the condyles and 

 the index on the tip of the olecranon, and the forearm completely extended, the 

 tip of the olecranon rises so as to be on the Hue joining the two condyles. In 



Fig. 720. — The Bexd of the Elbow with the Superficial Veins. 

 (From a dissection by Dr. Alder Smith in the Museum of St. Bartholomew's Hospital.) 



MEDIAN NER \'E 



Posterior branch of 



anaslomotica magna 



BRANCHES OF ' 



INTERNAL CUT A 



NEOUS NERVE 



Posterior ulnar vein, 



Brachialis antieus 



Anterior branch of 

 iinastoniotica magna 

 Anterior ulnar vein, 



Median basilic vein 



MUSCULAR BRANCH 

 OF MEDIAN NER VE 



Tendon of biceps 



Bicipital fascia 



Brachialis antieus 



Deep median vein 



Ulnar artery 



Pronator teres 



Radial artery 



Biceps 



Internal vena 

 comes of 

 brachial artery 

 Basilic vein 



Brachialis 

 antieus 



Cephalic vein 



Brachial artery 

 EXTERNA L 



CUTANEOUS 



NERVE 



Miiscnio-spiral 

 n. and ascending 

 branch of railial 

 reciirrint artery 

 Radial vein 

 Median cephalic 



vein 

 Ascending br. of 

 radial recurrent 

 RADIAL 



NER VE 

 Radial recurrent 



artery 

 Supinator 



longus 

 Descending br. 



of radial 



recurrent 

 Median vein 



RADIAL 

 NER VE 



flexion at a right angle, the olecranon is below the line of the condyles, and in 

 complete flexion (piite in front of them. Between the inner condyle and olecranon 

 is a pit, in which lie the ulnar nerve and the anastomosis between the inferior 

 profunda and the posterior ulnar recurrent arteries. The coronoid process is so 

 well covered by muscles, vessels, and nerves, that its position cannot be distinctly 

 made out. 



Swelling, due to effusion into the joint, appears on either side of the triceps 

 tendon, and soon obliterates tlie depression below the external condyle. A super- 

 ficial swelling over the tip of the olecranon is due to effusion into the bursa between 

 the soft parts and tliat bone. A deeper, less easily detined, swelling in the same 



