108 



ANATOMY IN A NUTSHELL. 



The trapezium ossifies the fifth year, and articulates with four bones, viz., 

 scaphoid proximally, trapezoid and second metacarpal internally, and the first 

 metacarpal distally. It has three muscles attached, Abductor pollicis, Flexor 

 brevis pollicis, Flexor ossis metacarpi pollicis. and occasionally the Extensor 

 ossis metacarpi pollicis. 



'The trapezoid ossifies the eighth year. It articulates with four hones, the 

 scaphoid proximally, second metacarpal distally, trapezium externally, and the 

 os magnum internally. It may have a few fibers of the Adductor obliquus 

 pollicis attached. 



PLATE XLI 



CAPSULAR LIGAMENT 



EXTERNAL LATERAL LIGAMEN1 



Tiii: Wrist-Joint — Anterior View 



The OS magnum ossifies the first year. It articulates with seven bones, 

 scaphoid and semilunar proximally, second, third, and fourth metacarpal dis- 

 tally, trapezoid on the radial side, and the unciform on the ulnar side. It has 

 one muscle attached, the Adductor obliquus pollicis. 



The unciform ossifies the second year. It articulates with five bones, semi- 

 lunar proximally, the fourth and fifth metacarpal distally, the cuneiform inter- 

 nally and the os magnum externally. It has three muscles attached, Flexor 



