354 



Muscles of the Leg. 



399. Muscles 



(The 



Tendines 

 m. flexoris 

 digitorum """ 

 brevis 



Liganientum 

 vaginale (cut - 

 open) X 



Mm. 

 himbricales 



M. flexor 



digit! V 



brevis 



Tuberositas 

 OSS. meta- 

 tarsalis V 



Cliiasnia 

 tendinuni 



of the sole of the right foot (2''i layer). 



ni. flexor digitorum brevis has been removed.) 



M. quadratns plau- 



tae (0. T. accessorius or 

 flexor accessorius digito- 

 rum pedis) (see also Fig. 

 400). Form: flat, qua- 

 drangular. Position: 

 in the sole of the foot, 

 bounded plantarward by 

 the m. flexor digitorum 

 brevis, dorsalward by the 

 lig. plantare longum and 

 caput obliquuni m. ad- 

 ductoris hallucis, lateral- 

 A^ard l)y the m. abductor 

 digit! V. Origin: by 

 two processes from the 

 inferior and medial sur- 

 faces of the calcaneus. 

 Insertion: forward to 

 the lateral margin of the 

 tendon of the in. flexor di- 

 gitorum longus. Action: 

 it draws the third pha- 

 lanx of the 2nd 5tli toe 

 plantarward. Inner- 

 vation: n. plantaris la- 

 teralis. 



Mm. liiniliricales, 

 four. Form: sjiindle- 

 shaped, narrow. Posi- 



M. abductor 

 -digiti V 



M. flexor 



hallucis 



brevis 



. flexor 

 ueis longus 



Process to the 



ni. flexor 

 igitoruni longus 



flexor 

 orum longus 



adratus 

 antae 



uctor hallucis 



calcanei 



draw the first phalanx medianward. 

 three lateral: n. plantaris lateralis. 



1. I nn crva t ion : one 



tion: between the ter- 

 minal tendons of the m. 

 flexor digitorum longus, 

 bounded plantarward by 

 the m. flexor digitorum 

 ])revis, dorsalward by the 

 mm. adductor hallucis 

 and interossei. Origin: 

 parti}' from the medial 

 margin, partly from the 

 opposed margins of the 

 tendons of the m. flexor 

 digitorimi longus. Inser- 

 tion: small tendons ex- 

 tern! forward, jjlantarward 

 ironi the ligg. capitulorum 

 [oss. metatars.] trans- 

 versa, and go over, at the 

 medial surface of the first 

 phalanx of the 2"<i 5tii 

 toe, into the triangular 

 (Expansions of the tendons 

 of the mm. ex'tensores di- 

 gitorum (as in the hand, 

 see p. 319). Action : 

 they flex the first phalanx 

 of the 2"*^ to the 5th toe, 

 and extend the second 

 and third phalanx: they 

 medial muscle: n. jdantaris medialis: 



