]kluscles of the Les 



359 



Origin of the 

 in. abductor hallueis 



Os naviculare - 



Origin of the ni. flexor 

 hallueis brevis 



Origins of the ni. adductor ^'^ 

 halhicis (caput obliquuni) 



Os metatarsalo I x % 



Mm. interossei dorsales 



Insertions of the 

 m. flexor hallueis brevis 



Insertion of the "^ 

 ni. adductor hallueis 



Phalanx I 



^- Liganu'iUuiii i)lantare_longuni 



Tendo ni. peronaei longi 



Origin of the ni. flexor 

 digiti V brevis -(cut off) 



Mm. interossei plantares 



Insertion of the 

 ni. flexor digiti V brevis 



404. Mm. interossei pedis dextri, 



viewed from the plantai' surface. 



M. flexor digiti quiiiti brevis (0. T. flexor brevis minimi digiti pedis) (see also 

 Figs. 398 -100). Form: rounded, narrow, small. Position: in the sole of the foot, on the 

 plantar surface of the os metatarsale V, partly covered plantarward by the m. abductor digiti V, 

 otherwise only by the aponeurosis plantaris. Origin: basis oss. metatarsalis V and lig. 

 plan tare longum. Insertion: the fibers nin converging forward and, becoming tendinous, 

 go to the base of the first phalanx of the little toe. Action: it draws the 1^* i:ihalanx of 

 the little toe plantarward and lateralward. Innervation: n. plantaris lateralis. 



M. opponens digiti quinti (see Figs. 400 and 409). Form: flat, triangular, small. 

 Position: directly upon the plantar surface of the os metatarsale V, covered plantarward by 

 the m. abductor digiti V, bounded medianward by the m. flexor digiti V. Origin: lig. plan tare 

 longum, fused with the m. flexor digiti V brevis. Insertion: the fibers run lateralward and 

 forward to the os metatarsale V. Action: it draws the little toe plantarward and median- 

 ward. Innervation: n. plantaris laterahs. 



Mm. interossei plantares, three. F o r ra : oblong - spindleshaped, small. Position: 

 in the interspaces between the ossa metatarsalia 11 V, plantan\"ard from the mm. interossei 

 dorsales ; projecting somewhat toward the sole of the foot and covered there by all the muscles 

 of the sole of the foot. Origin: from the medial surface of the ossa metatarsalia III V. 

 Insertion: the fibers of each muscle go, converging, forward to a narrow tendon, which (like 

 the tendons of the mm. interossei dorsales, see p. 358) go to the back of the first phalanx and 

 to the tendons of the mm. extensores digitonun. The three muscles run on the medial side 

 of the 3rd 5th toe. Action: they draw the 3rd 5th toe medianward, flex the first phalanx 

 of each and extend their second and third phalanges. Innervation: n. plantaris laterahs. 



