THE ELBOW 



U" 



region is due to inllnniiiiation of the hursa betwoon the olecranon and the triecps. 

 A swelling on the iiuifr side of the elbow-joint, if painful aud acc<»ni|)anic<l bv 

 inrtanniiation of the skin, may be due to mischief iu the epitrochlear gland 

 situated just above the internal condyle, and reccnviug ]ym])haties from the inner 

 border of the forearm and the two imier fingers. 



The hollow in front of the elbow, — The delicacy of the skin liere must 

 always be borne in mind in tlie apitlication of splints. The |\/|-like arrangement 

 of the superficial veins as usually deseril)ed is by no means constant (figs. 719, 

 720). The median basilic is the vein usually chosen for venesection, owing to its 

 larger size and its being firmly supported by the subjacent bicipital fascia which 

 sc^parates it from the brachial artery; but the median cephalic is the safer. The 

 median basilic is crossed l)y l.)ranches of the internal cutaneous nerve, while those 



Fig. 721. — The Brachial Artkry at thk Bkxd ok the Kf.bow. 



POSTERIOR BRANCH 

 OF IMKRNAL 

 CUTANEOUS NERVE 

 ANTERIOR BRANCH 

 OF INTERNAL 

 CUTANEOUS NERVE 



Brachial artery — f 



BRANCH TO 

 PRONATOR TERES 



Bicipital fascia, cut 



Pronator radii teres 

 muscle 



MEDIAN NERVE 



Ulnar arUry 



Biceps muscle 



IIRANCII OF MUSCULO- 

 SPIRAL NERVE TO 

 SUPINA TOR LONO US 



RADIAL NERVE 



Radial recurrent artery 



„,„l POSTERIOR 



J. \TEl: OSSEOUS 



NERVE 

 Tendon of biceps 



.1/ 1 SCI 'L 0-CU TA NEO I '.V 

 NERVE 



Supinator longus muscle 



- Radial artery 



of the musculo-cutaneous lie under the median cephalic. In the semiflexed position, 

 the fold of the elbow is seen, a little above the level of the joint. This forms the 

 base of the triangular fossa l)elow the elbow, the outer side corresi)onding to the 

 brachio-radialis, the inner to the pronator radii teres, and the ajiex to the meeting 

 of these muscles. The tendon of the bice])S can ])e easily made out in the centre 

 of the fossa, giving off al)ove the bicipital fascia from its inner side t(j fasten down 

 the flexors of the forearm. Under the tendon on its inner side lie the brachial 

 artery and the median nerve for a short distance. The musculo-spiral lies outside 

 the fossa, between the brachio-radialis and the brachialis anticus. The brachial 

 usually bifurcates opposite to the neck of the radius. 



The arterial anastomoses about the elbow-joint are as follow: The radial 

 recurrent runs u}) under cover of the braehio-ratlialis to anastomose with the 



