Muscles of tlio Leu'. 



35- 



402. Muscles of the back of the right foot i^'"^ i? 



aver 



(The mm. tibialis auterinr 

 and extensores longi as well 

 as the inferior limb of the 

 lig. cruciatum cruris have 

 been removed.) 



M. 



M. extuiisor lia 

 loiigus 



extensor digitoruni 

 longus 



_ TibiH 



Malleolus lateralis 



Llgamentum 

 cruciatum cruci 



Retinaculum mm. 



peronaeorum 



inferius 



M. peronaens 

 brevis 



M. extensor 

 fligitorum 

 brevis 



M. extensor digitoriim 

 brevis (see also Figs. 390. 

 401 and 409), Form: 

 Hat, triangular. Position: 

 upon the Ijack of the foot. 

 directly ujjon the bone, 

 partly covered b}' the ten- 

 dons of the m. extensor di- 

 gitoruni longus. Origin: 

 lateral and superior surface 

 of the cori)us calcanei, in 

 front of the entrance into 

 the sinus tarsi, covered by 

 the, lateral limb of the lig. 

 cruciatum cruris. Inser- 

 tion: the fibers diverge 

 forward and form four small 

 muscular bellies , which, 

 upon the ossa raetatarsalia, 

 go over into flat , delicate 

 tendons. Of these, the three 

 lateral run to the first 

 phalanx of the 2"cl 4ti 

 toe, fuse with the corre- 

 sponding tendons of the m. 

 extensor digitoruni longus 

 and go with the latter tn 

 the second and third pha- 

 lanx. The medial, strongest 

 tendon , along with the 

 muscle belonging to it, is 

 given a special name, being 

 called the m. extensor 

 Lallueis brevis; itextends 

 obliquely medianward and 

 becomes attached partly to 

 the base of the first pha- 

 lanx of the great toe; partly 

 it becomes united with the 

 tendon of the m. extensor 

 hallucis longus. Action: 

 it draws the 1st 4111 ^q^ 

 dorsalward and lateral- 

 ward. Innervation: n. 

 peronaeus profundus. 



Bursa subteudinea m. 

 tibialis anterioris (see 

 also Fig. 406), very frequent- 

 ly present between the me- 

 dial surface of the os cunei- 

 forme I and the tendon I'f 

 the m. tibialis anterior. 



Bursae intermetatarsophalan^eae, 

 four, l)etween the heads of the ossa nieta- 

 tarsaha ; the three medial ahiiost constant, 

 the fourth only occasionally present. 



M. peronaeus longus 



M. peronaeus 

 lertius (cut off) 



yi. abductor 

 digiti V 



Jim. 

 interossei = 

 dorsales 



Tendines 

 m. exteii- 

 soris digi- 

 toruni longi 



Ligamentum 

 transvcrsum cruris 



Compartment for 

 m. tibialis anteric 



IMalleolus medial 



Compartment foi 



m. tibialis antei 



Compartment fo) 



m. extensor hall 

 longus 



Compartment fc 

 the ra. extenso: 



dlgitorum longi 



Tendo m. tibis 



anterioris 



M. extensor 



hallucis brevir^ 



B. subtendinei 



m. tibialis 

 anterioris 



Tendo 



m. extensoris 

 hallucis longi 



M. abductor 

 hallucis 



^^^^ 



Bursa( 

 intermel 



tarso- 

 phalang( 



