THE MEDIAN ARTERY 655 
considerable size which arises at the level of the interosseous space, through which 
it passes outward. Before entering the space it gives off a small branch, the volar 
Deltoid 
Brachiocephalicus 
Lateral head of 
triceps (cul) Fm 
— Tensor fascie antibrachii 
Long head of triceps 
Branch of radial nerve to 
heads of trice ps and anconeus 
Deep brachial artery 
Radial nerve 
Long head of triceps 
Medial head of trice ps 
Anconeus 
Lateral head of triceps (cut off) 
Olecranon 
Cutaneous branch of 
axillary nerve 
terior radial artery J d 
Anterior radial artery Ulnar head of deep flexor 
Cutaneous branch of ulnar 
nerve 
Lateral lig. of elbow 
Ulnaris lateralis (cut 
and reflected) 
Common digital extensor 
Brachialis 
Extensor carpi radialis ; 
Common interosseous arte ry 
Ulna 
Ulnar head of common 
digital extensor 
Deep digital flexor 
Lateral digital extensor 
Ulnar nerve and vein 
Ulnaris lateralis (stump) 
Dorsal interosseous artery 
Superficial branch of ulnar 
nerve 
Carpal sheath (opened) 
Lateral tendon of ulnaris 
lateralis 
Accessory carpal bone 
Extensor carpi obliquus 
Tendon of extensor carpi 
radialis 
Lateral lig. of carpus - Accessorio-metacar pal 
¢ ligaments 
Rete carpi dorsale g 
Tendon of common extensor Band from accessory carpal 
to lateral extensor tendon 
Branch to lateral extensor Lateral extensor tendon 
Fic. 568.—Dissection or Lerr ForEARM OF Horse; LaTERAL SURFACE. 
The radial and ulnar heads of the anterior digital extensor are shown in front of the lateral extensor, but are not 
marked. The muscular branches of the radial nerve are shown, but not designated individually. Dotted lines indi- 
cate contour of parts of muscles which have been removed (lateral head of triceps, extensor carpi radialis, lateral flexor 
of carpus). (After Schmaltz, Atlas d. Anat d. Pferdes.) 
interosseous artery (A. interossea volaris), which descends to the radial head of the 
| deep flexor. In the space it supplies the nutrient arteries of the radius and ulna. 
