The Forearm. 79 



above described. The line for the ulnar artery is not so 

 simple as that for the radial because of the curve in its 

 upper third. The direction of the lower two-thirds of 

 the ulnar artery corresponds to a line drawn from the 

 front of the internal condyle to the outer side of the pisi- 

 form bone, while the upper third corresponds to the 

 curve, i.e., to a line drawn from a point one-half inch 

 below the centre of the bend of the elbow (the point of 

 bifurcation of the brachial) to the junction of the upper 

 and middle thirds of the first line. (Fig. 2.) 



Nerves. Median, a line drawn from a point one-half 

 inch internal to the tendon of biceps, at the bend of the 

 elbow, to the space between the two prominent tendons 

 occupying the middle of the front of the wrist, viz., the 

 flexor carpi radialis externally and the palmaris longus 

 internally. 



Radial. A line drawn from a point one-half inch ex- 

 ternal to the biceps tendon, on a level with the condyles 

 of the humerus, to a point three inches above the styloid 

 process of the radius, and from this, obliquely over the 

 outer border of the forearm to a point on the dorsum of the 

 hand, midway between the metacarpal bone of the thumb 

 and the metacarpal bone of the index finger. 



Ulnar. A line drawn from the posterior surface of 

 the internal condyle and passing, below the condyle, to the 

 radial side of the pisiform bone, agrees fairly well with 

 the course of this nerve. 



Posterior Inter osseous. A line drawn from a point 

 one-half inch external to the biceps tendon at the level of 

 the condyles, downward and outward, below and in front 

 of the external condyle, to the middle of the back of the 

 forearm, and from this point vertically downwards to the 

 back of the wrist joint. The knowledge of the general 

 direction of the muscles of the forearm and of the course 



