346 



Muscles cf the Leg. 



Tendo m. bicipitis 

 femoris 



Bursa m. bicipitis 

 femoris inferior 



i / \ 



M. peronaeus 

 longus 



M 



>r. peronaeus _ t-.-VU i M 



brevis 



'\'!M\ 



Fibula 



Ligamentum 

 traiisvLTsum cruris" 



Malleolus lateralis '"1 



Ligamentuni 

 cruciatum cruris 



!M. peronaeus 

 tertius 

 M. extensor / 



digitorum longus - , - 



"^hh 



vl/ 



M. vastus 

 medialis 



- Patella 



^Meniscus 

 niodialis 



Ligamentuni 

 collaterale tibiale 

 Ligamentuni 

 patellae 



Tuberositas tibiae 



Mm. sartorius, 



gracilis et 



seniitendinosus 



(cut off) 



M. 

 Ljastrocnemius 



-_ M. soleus 



Facies medialis 

 tibiae 



-. M. tibialis anterior 



M. extensor hallucis 

 longus 



M. extensor digitorum 

 longus 



-iSIalleolus medialis 



M. tibialis anterior 



M. extensor 



lialhieis longus 



391. Muscles of 

 the right leg, 



viewed from in front. 



M. extensor digitorum longus 



(see also Figs. 39U, 401 and 402). 

 Form: flat, oblong. Position: 

 just beneath the skin, on the lateral 

 surface of the leg; bounded median- 

 ward above by the m. tibialis an- 

 terior, below by the m. extensor 

 hallucis longus, lateralward above 

 by the ni. peronaeus longus, below 

 by the m. peronaeus brevis. rigin : 

 fleshy, from the condylus lateraUs 

 tibiae, capitulum and crista anterior 

 fibulae, septum intermusculare an- 

 terius [fibulare], membrana interossea 

 cruris and the inner surface of the 

 fascia criiris. Insertion: the fibers 

 extend downward and forward to a 

 tendon beginning medianward in the 

 middle of the leg, which runs, 

 through the lateral compartment of 

 the lig. transversum and of the lig. 

 cruciatum cruris, forward and down- 

 ward and becomes subdivided into 

 five tendons ; of these, the four me- 

 dial tendons diverge to the heads 

 of the ossa metatarsalia 11 Y, unite 

 at the 2nd 4th toe with the cor- 

 responding tendons of the m. extensor 

 digitorum brevis, pass forward upon 

 the dorsal surface of the phalanges 

 of the toes, and each becomes at- 

 tached by a middle process to the 

 second, and by two lateral processes 

 to the third, phalanx. Upon the first 

 phalanx each tendon forms, as in 

 the fingers (see p. 312), a triangular 

 expansion, into the lateral processes 

 of which the mm. lumbricales and 

 interossei are inserted. The fifth 

 tendon, that situated farthest lateral- 

 ward, and the muscle belonging to it, 

 usually incompletely separated above, 

 namely the m. peronaeus tertius 

 (see also Figs. 390, 401 and 409) 

 extends to the dorsal surface of the 

 OS metatarsale V. Action: it 

 flexes the foot dorsalward, lifts the 

 lateral margin of the foot, and 

 draws the 2"d 5tli toe dorsalward. 

 Innervation: n. peronaeus pro- 

 fundus. 



