358 



]\Iuscles of the Leg. 



Os cuboideuni 



Tuberositas ossis 

 raetatarsalis V 



Mm. iiiterossei dorsales -, 



Phalanx I 



Tendons of the nnu. extensores 



digitorum j. j, 



Os naviculare 



Ossa cuneiformia 



Os nietatarsale I 



Teiido m. extensoris 

 hallucis brevis 



Phalanx I 



II 



403. Mm. interossei dorsales pedis dextri, 



viewed from the dorsal surface of the foot. 



Mm. interossei dorsales (see also Fig. 404), four. Form: oblong-triaugitlar, penni- 

 form, small. Position: in the interspaces between the ossa metatarsalia, projecting somewhat 

 ].lantarward; covered dorsalward by all the muscles of the back of the foot, plantanward by 

 all the muscles of the sole of the foot. Origin: from the adjacent sides of each pair of 

 ossa metatarsalia. Insertion: the fibers of each muscle rtm converging forward to a small 

 tendon; this extends dorsalward from the lig. capitulorum [oss. metatars.] transversum to the 

 dorsal surface of the first phalanx and goes over into the triangular expansion of the tendons 

 of the mm. extensores digitorum situated there. The tendon of the first (most medially 

 situated) muscle runs on the medial side of the 2"d toe. while the tendons of the second to 

 the fourth muscle lie on the lateral surface of the 2d_4th t(3e. Action: the first draws the 

 2"<1 toe medianward, the others draw the 2ud 4tii toe lateralward; all flex the first phalanx 

 and extend the second and third of these toes. Innervation: n. plantaris lateralis. 



