Muscles of the Lei. 



349 



394. Muscles of 



the right 1 eg (2"'^ layer), 

 viewed from behind. 

 (The in. 



I'laiiuiii ijopliteuin 

 fenioris 



"aput niediale 

 111. gastrocneinii _. 

 (^cut away) 



Bursa m. 



gasTocnemii 



medialis 



yi. seniimein 



branosus 



/I 



Bursa m. senii- 

 niembranosi 



M. popliteus 



Caput laterale 



m. gastrooiieiuii 



icut away) 



p]antaris 



peionaeus 

 loiigus 



INf. soleus 



gastrocnemius has been 

 removed.) 



M. soleus (see also Figs. 3S9 to 

 391 and 393). Form: flat, spindle- 

 shaped, thick. Position: on the 

 posterior side of the leg. almost 

 completely covered by the m. gastro- 

 cnemius, bounded above bv the m. 



.., ,, . . f. -,, . memoranosi n 



popliteus. Urigm: from the capi- ^ 



tulum and facies posterior fibulae, 

 linea poplitea tibiae and from a tendi- 

 nous arch between the twci. Inser- 

 tion: backward and do\mAvard to 

 a broad superficial tendinous strip, 

 which becomes narrower and thicker 

 belo^- and goes over into the tendo 

 calcaneus. Action: it fle.xes the 

 foot plantarward and supinates it. 

 IninTvat ion: n. tibialis. 



M. plautaris (see also Figs. 3S4, 

 390 and 393). Form: flat, short- 

 spindleshaped. Position: on the 

 back of the leg, bounded lateral ward 

 Ijy the caput laterale m.gastrocnemii, 

 in front by the capsule of the ji'int 

 and the m. popliteus. Origin: 

 planum popliteum femoris above the 

 condylus lateralis, fused with the 

 capsule of the joint. Insertion: 

 inedianward and downward to a long, 

 narrow tendon which passes upon 

 tlie posterior surface of the ni. soleus, 

 in fi'ont of the m. gastrocnemius, on 

 the medial side of the tendon of tiie 

 latter and goes over into the tendo 

 calcaneus ; in addition some fibers 

 go to the fascia. Action: like the 

 m. gastrocnemius : it makes the fascia 

 tense. Innervation: n. tibialis. 



M. popliteus (see also Figs. 258, 

 261. 392. 395 and 396). Form : flat, 

 triangular. Position: on the back 



of the knee-joint and of the tibia, '?"^".*... " T'lll ifl 



covered by the mm. plantaris and 

 gastrocnemius, bounded below by 

 the m. soleus. Origin : by a narrow 

 tendon fi-om the epicondylus lateralis 

 femoris fb. m. poplitci see Figs. 261 

 and 396). in addition by a fleshy 

 origin from the lig. popliteum arcua- 

 tum. Insertion: diverging me- 

 dianward and downward to the facies 

 posterior tibiae. Action: it flexes 

 the leg and rotates it inward. In- 

 nervation: n. tibialis. 



Bursa m. gastrocuemii medialis, almost constant, between the uppermost part of 

 the capsule of the knee-joint, the femur and the caput mediale m. gastrocneinii: it very 

 frequently communicates with the cavity of the knee-joint. 



Spalteholz, Atlas. 23 



I 



\i -. ' 



M. Hex or digitoruiii 



]ongus 

 yi. flexor halliieis 

 longus 

 M. tibialis 

 posterior 



Malleolus medialis 



Tendo calcaneus _ 

 [AchillisJ 



Ligamentum ,^' 

 laciniatum 

 Tuber calcanei 



Tendo 



ni. gastrocneinii 



(cut away) 



jr. peronaeus 

 longus 



.M. 



^^- 



peronaeus 

 brevis 



^/ 



Malleolus lateralis 



Retinaculum 



mm. peronaeorum 



superius 



i- 



