94 LABORATORY MANUAL OF HUMAN ANATOMY 



(e) Ulnar flexor muscle of wrist (M. flexor carpi ulnaris). 



(ea) Humeral head (caput humerale). 



(eb) Ulnar head (caput ulnare). 



What large nerve runs between these two heads'? 

 (/) Superficial flexor muscle of the fingers (M. flexor digitorum sublimis). 



(fa) Humeral head (caput humerale). 



(fb) Radial head (caput radiale). 



Note space between these two heads for the passage of 

 A. ulnaris and N. medianus. 



(See study of these flexor muscles by Professor McMurrich, of Ann 

 Arbor, in the Amer. Jour, of Anat., Baltimore, vol. ii., No. 2.) 



Ulnar Blood-vessels and Ulnar and Median Nerves. 



These structures and their branches should next be carefully 

 studied. Better to expose the ulnar artery, cut through the inter- 

 muscular septum between the M. flexor digitorum sublimis and 

 the M. carpi ulnaris. 



(a) Ulnar artery (A. ulnaris). 



Study its origin, course, relations, and the following branches : 



(aa) Recurrent ulnar arteries (Aa. recurrentes ulnares). 



(ab) Muscular rami (rami musculares). 



(ac) Volar carpal ramus (ramus carpeus volaris) (0. T. anterior 



ulnar carpal). 



(ad) Dorsal carpal ramus (ramus carpeus dorsalis) (0. T. poste- 



rior ulnar carpal). 



(ae) Common interosseous artery (A. interossea communis). 



(aea) Volar interosseous artery (A. interossea volaris) (0. 



T. anterior interosseous) (vide infra). 



(aeb) Dorsal interosseous (A. interossea dorsalis) (0. T. 



posterior interosseous), to be studied later. 



(b) Ulnar veins (Vv. ulnares). 



(c) Ulnar nerve (N. ulnaris). 



(ca) Palmar cutaneous ramus (ramus cutaneus palmaris). 



(cb) Dorsal ramus of hand (ramus dorsalis manus) (O. T. dorsal 



cutaneous). 



(cba) Dorsal digital nerves (Nn. digitales dor sales), 

 already studied (vide supra}. 



(cc) Volar ramus of hand (ramus volaris manus) (branches in 



palm to be studied later). 



(cd) Rami musculares to M. flexor carpi ulnaris and part of M. 



flexor digitorum profundus. 



(d) Median nerve (N. medianus). 



Reflect the humeral head of the M. pronator teres and 

 the radial head of the M. flexor digitorum sublimis, and 

 study the median nerve throughout its whole course in the 

 forearm. Note its relation to the A. mediana. Examine 

 (da) Muscular rami (rami musculares) to Mm. pronator teres, 

 flexor carpi radialis, palmaris longus, flexor sublimis digi- 

 torum, i.e., to all muscles of superficial group except M. 

 flexor carpi ulnaris. 



