THE CUNEIFORM BOXES 



167 



Articulations. — "With the head of the astragahi;^, Avith the three ciinciforni bones, 

 and frequently with tlie cuboid. 



Muscle attached to the scaphoid. — The tibialis posticus is inserted. 

 Ligaments : — 



Dorsal, j)lantar, and interosseous cubo-S(^aphoid. 

 Dorsal and plantar scapho-cuneiform. 

 External and inferior calcaneo-scaphoid. 

 Astragalo-scaphoid. 



Ossification. — The nucleus for the scaphoid appears in the course of the fourth 

 year. The tubercle of the scaphoid, into which the tibialis posticus acquires its 

 main insertion, occasionally develoj)S separately, and sometimes remains distinct 

 from the rest of the bone. 



THE CUNEIFORM BONES 



The cuneiform l)ones, three in number, are named from within outwards — 

 internal, middle, and external. They are wedge-shaped. 



The INTERNAL CUNEIFORM is distinguished by its large size, and from tlie 

 fact that, when articulated, the base of the wedge is directed downwards, and the 



Fig. 177. — The Left Interxal Cuneiform. (Internal suriiice.) 



FOR FIRST METATARSAL 



FACET FOR THE TENDON OF THE TIBIALIS ANTICUS 



sharp border upAvards. The posterior surface is concave and pyriform for articu- 

 lating with the inner facet of the scaphoid. The anterior surface is a reniforrn 

 articular facet for the base of the first metatarsal. The internal surface is rough, 

 and presents an oblique groove for the tendon of the tibialis anticus : this groove is 

 limited inferiorly by an oval facet into which a portion of the tendon is inserted. 



Fig. 178. — The Left Internal Cuneiform. (External surface, i 



FOR SECOND METATARSAL 



FOR MIDDLE CUNEIFORM 



FOR SCAPHOID 



The external surface is concave and rough, except along the posterior and supe- 

 rior borders. Near the anterior extremity of the superior border there exists a 

 distinct circular facet for the inner side of the base of the second metatarsal. In 

 front of the facet a few fibres of the first dorsal interosseous muscle arise. The 

 remaining sinuous articular facet is for the inner surface of the middle cuneiform. 



