130 



THE SKELETON 



deei>lv concave for the head of the nnignuni. The uhiar ridge of the inferior artic- 

 ular surface is faceted for tlie unciform: The outer (radial) surface has a narrow 

 semilunar faert for the scaphoid, whilst the inner (ulnar) aspect ot the bone pre- 

 sents a .luadrilateral faeet for the l)ase of the cuneitorm. The palmar and dorsal 

 surfaces are rough and non-articular. . 



Articulations.— \\'ith the radius, scaphoid, cuneitorm, magnum, and uneitorm. 



Fig. 135.— The Left Haxp. (Palmar surface.) 



Fleior brevis 



pollioiB Abductor poUicia 



Flexor carpi ulnaria 



Abductor minimi - — 

 digiti 



Flexor brevis and 

 opponens minimi 

 digiti 



Flexor carpi 

 ulnaria 



Adductor pollioiB 



Opponens minimi 

 digiti 



Abductor and 

 flexor brevis 

 minimi digiti 



Opponens pollieia 



Occasional insertion into trapezium 

 Extensor ossis metaearpi pollicis 

 Flexor carpi radialis 



Interosseas primus volaria 

 Opponeas pollicis 



Flexor brevis and 

 Abductor pollicis 



Flexor brevis and 

 Adductor pollicis 



Flexor lougus 

 pollicis 



Flexor profundus digitorum 



The Cuneiform 



The cuneiform (or pyramidal hone) rests hy its l)ase on the uhiar side of the 

 semihmar; its apex is (Hrt-ctcd downwards and to the uhiar side, and serves for the 

 attaehment of the internal lateral ligament of the wrist. The base i)resents a faeet 

 for the semilunar. The inferior surface has a sinuous articular surface for the 

 uneiform hone. Tiie superior surface has a convex smooth portion, where it 

 l)lays ui)on the interartieular cartilage which intervenes between it and the lower 

 end of the ulna; the remainder of this surface is rough for ligaments. The palmar 



