Fig. 79. DISSECTION OF THE FOREARM, POSTERIOR. i, External condyle. 2, Poste- 

 rior interosseous nerve coming through the supinator brevis muscle. 3, The posterior inter- 

 osseous artery. 4, Radius. 5, Extensor ossis metacarpi pollicis. 6, Extensor brevis pollicis 

 (extensor primi internodii pollicis). 7, Outer branch of the anterior interosseous. 8, 

 Tendon of the extensor carpi radialis brevior. 9, Styloid process of radius. 10, Small por- 

 tion of the posterior annular ligament, n, Tendon of the (divided) extensor longus pollicis 

 (extensor secundi internodii pollicis). 12, Posterior carpal arch, radial side. 13, Radial 

 nerve, cutaneous branch to thumb. 14, Digital arteries. 16, Abductor indicis, first dorsal in- 

 terosseous muscle. 17, Anastomosis of dorsal with palmar digital arteries. 18, The three inner 

 interossei. 19, Abductor minimi digiti. 20, Tendon of the extensor carpi ulnaris. 21, Pos- 

 terior carpal arch, ulnar side. 22, The extensor indicis. 23, Ganglionic enlargement of the 

 posterior interosseous nerve at the back of the wrist-joint. 24, Inner division of the anterior 

 interosseous artery. 25, Posterior interosseous artery. 26, The same. 27, The ulna. 28. 

 Recurrent interosseous artery. 29, Anconeus. 30, Olecranon process. 



