THE FOREARM 



llGl 



Soft parts. — Along the outer border descend the brachio-radialis and radial 

 extensors of the carpus, fleshy above, tendinous below. . About an inch and a half 

 above the styloid process of the radius, a fleshy swelling directed obliquely down- 

 wards and forwards from behind, across this outer border of the forearm,' denotes 

 the extensors of the thumlj crossing those of the carpus. 



Along the inner border is the fleshy mass of the i)ronator teres and flexors, the 

 ulna being covered by the flexor carpi ulnaris and flexcjr profundus. Tlip tendon 

 of the pronator is inserted into the radius a little below its centre — a point <^f 

 importance in the treatment of fractures, and in amputation. The flexor carpi 

 ulnaris tendon can ])e felt just alwve the wrist making for the pisiform bone; and 

 just external to it lies the ulnar artery, about to pass over the anterior annular 



Fig. 725.— Distribution of Cutaneous Nekves ox thk Anterior and Posterior Aspects 



OF THE Superior Extremity. 



J.VTESXAL 

 CCTANEOUS OF 

 MCSCCLO- 

 SPIRAL 



INTERNAL 

 CUTANEOUS 



PALyfAR 



CUTANEOUS OF 



MEDIAN 

 PALMAR 



CUTANEOUS OF 



ULNAR 



SUPRA- 



ACROMIAL 



CIRCUMFLEX 



ISTBRCOSTQ- 



HUMERAL 



CIRCUM-] 

 TWIG OF FLEX , 



INTERNAL 



CUTANEOUS 



BXTERXAL 

 rCTAXEOUS OF 



MUSCULO- 



SPIRAL 



MUSCULO- 

 CUTANEOUS 



EXTERNAL 



CUTANEOUS 



OF 



MUSCULO- 



SPIRAL 



RADIAL 



PALMAR 



CUTANEOUS 

 OF RADIAL 



SUPRA- 

 ACROMIAL 



INTERNAL 

 CUTANEOUS OF 



MUSCULO- 



SPIRAL 

 INTERCOSTO- 



H UMBRA L 



NER VE OF 

 WRISIiERG 



INTERNA L 

 rUTANEOUS 



ligament. The course of the artery is denoted by a line drawn from the front of 

 the internal condyle to the outer edge of the pisiform bone. If it be drawn from 

 the bifurcation of the brachial, this line must in its upper third be made stronglv 

 convex inwards, in order to mark the upper part of the artery, here thickly cov- 

 ered by muscles. The line of the ulnar nerve is one drawn from the interval 

 between the internal condyle and the olicninon to the inner side of the ulnar arterv 

 ju.st above the wrist. The nerve joins the artery at the junction of the upper and 

 middle thirds of the forearm. The median nerve runs in a line drawn from the 

 inner side of the brachial artery, in the elliow triangle, to a point beneath, or just 

 to the inner side of, the palmaris longus just al)Ove the wrist. The radial artery 

 will be marked by a line drawn from the centre of the bend of the elljow (where 

 the brachial artery divides opposite to the neck of the radius) to a point just 



