SHOULDER, ARM, l-OK l-.A R.M, AND ll.\.\n. 



173 



1. Roof, formed by skin and fascia: superficial and deep. 



2. /'/oar, formed by flexor longus pollids aiul pronator quadratus. 



T,. Outer border, formed by supinator longus or brachio-radialis muscle. 



4. Inner border, formed by the flexor carpi radialis and pronator radii teres. 



5. Contents, consisting of tin- radial artery and its ven;e comites. 

 The ulnar groove has these geometrical parts : 



1. Roof, formed by the skin and fasdir, superficial and deep. 



2. I'loor, formed by the flexor profundus digitorum muscle. 



MEDIAN NERVE 

 Posterior branch of 



BRANCHES OF ( 



;\ //;/; .v.i /, rrr.-i-- 

 .\7.v>r> .VAV.T/-; ( 



Posterior ulnar vein 



Brachialia anticue 

 .4 nter for branch of 



[nh-i'tni- <:' 



Median basilic vein 



M I '.SCULA R BRA NCH 

 OF MEDIAN NER VE 



Tendon of biceps 

 Bioipital faacia 



Braohlall* antioua 



1' ;> median vein 



L'tnar artery 



Pronator teres 



Radial art 



Bleeps 



lui.'innl vena 

 comet of 

 brachiat artery 

 Ilasilic vein 



Srachlalls 



aiitiouB 



Brachial art fry 

 EXTERN A A 



CUTAXEOCS 



.\ERVE 

 Musculo-spiral 

 it. and ascending 

 branch of radial 

 recurrent artery 

 Radial vein 

 Median cephalic 



vein 



Ascending br. of 

 radial recurrent 

 RADIAL 



SERVE 



Hdilinl recurrent 



artery 

 Supinator 

 longus 



Descending br. 



of radial 



recurrent 

 Median vein 



RADIAL 

 NERVE 



IMG. 118. TIIK HKM> in- THE Ki.novv WITH THK Sri'KKiiciAL VEINS. 

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



3. Outer border, formed by the flexor sublimis digitorum muscle. 



4. Inner border, formed by the flexor carpi ulnaris muscle. 



5. Contents, which are : ulnar artery, vena:; comites, and ulnar nerve. 

 Dissection (Fig. 117). The Radial Artery. Cut through the roof of the 



groove. Then, with your scissors and forceps or director, follow the artery up 

 to the bifurcation of the braeliial artery. Observe the numerous small muscular 

 branches that are given off by this artery both to muscles and skin. 



The Ulnar Artery. Cut through the roof of its groove and follow it up as 

 far as you can without cutting into the flexor sublimis digitorum muscle. Note 



