96 Anatomy Applied to Medicine and Surge? y. 



Deep Landmarks. The styloid process of the ra- 

 dius is situated on the outer aspect of the wrist joint and 

 is about three-eighths of an inch lower down, i.e., nearer 

 the hand than the styloid process of the ulna, which is on 

 the inner side of the joint. Immediately below the styloid 

 process of the radius is felt a prominence formed by the 

 tuberosity of the scaphoid and the ridge of the trapezium, 

 while, internally, is another one, which corresponds to the 

 pisiform bone and to the hook of the unciform. The line 

 joining the upper border of these prominences agrees 

 with the upper limit of the anterior annular ligament. 



The upper landmark for the wrist joint is indicated by 

 a convex line joining the tip of the styloid process of the 

 radius with the tip of the styloid process of the ulna so 

 that the highest point of its convexity is three-eighths of 

 an inch above the straight line directly joining the pro- 

 cesses. The lower limit of the joint is represented by a 

 line, slightly convex downwards, and drawn from 

 a point three-quarters of an inch below the pisi- 

 form, internally, to a point half an inch below 

 the ridge formed by the tuberosity of the scaphoid, 

 externally. The mid-carpal 

 joint may be roughly represent- 

 ed by a convex line starting 

 from the tip of the scaphoid ex- 

 ternally and ending immediately 

 below the pisiform internally. 

 This line is shaped somewhat 

 like the Greek letter Omega, the 

 tip of its convexity being about 

 half an inch below the apex of 

 the upper line of the wrist joint. 

 Landmarks for the Individual 



Landmarks for Bones of Carpus. BonS of the CarpUS. Draw a 



