158 



LABORATORY MANUAL OF HUMAN ANATOMY 



Incise now the deep fascia longitudinally, midway between 

 the tibia and fibula, but do not cut through the Lig. transversum 

 cruris or the Lig. cruciatum cruris. Note that the fascia becomes 

 continuous medialward with the periosteum of the tibia, and that 

 lateralward it sends a septum into the crista anterior of the 

 fibula, forming the anterior [fibular] intermuscular septum (sep- 

 tum intermusculare anterius [fibulare]) (0. T. anterior peroneal 

 septum). This latter septum separates the contents of the 

 " anterior tibiofibular compartment" of the leg from the con- 

 tents of the " peroneal compartment." The latter is bounded 

 posteriorly by another septum going into the crista lateralis of 



FIG. 64. 



M. tibialis anterior 

 Tibia- 



V. saphena magna 

 N. saphenus^ 



M. flexor digitorum longus^ 

 M. tibialis posterior, 



A. tibialis posterior. 

 N. tibialis- 



M. gastrocnemius 

 (caput mediate) 



Tendon of the M. plantaris -- 



M. soleus-" 



A", cutaneus surae medialis' 



Membrana interossea cruris 

 A. tibialis anterior 



A", peronaeus profundus 



.!/. tjirnsor digitorum longus 

 Septum intermuscular e 



anterius (fibulare) 

 ^ M. extensor hallucis longus 



_N. peronaeus superficialis 

 ^.M. peronaeus longus 



-.Septum intermusculare 

 posterius (fibulare) 



^-A. peronaea 



Lamina pr funda^ fasc . ae 



,. f cruris 

 Lamina superficiahs) 



' Ramus anastomoticus peronaeus 

 saphena parva 



Cross-section of the right leg a little above its middle. Surface distal to the cut. (After Toldt, 

 Anat. Atlas, Wien, 1900, 2 Aufl., p. 642, Fig. 1023.) 



the fibula and known as the posterior intermuscular septum (sep- 

 tum intermusculare posterius) (0. T. posterior peroneal sep- 

 tum). It will be studied later. Examine Fig. 64 carefully. 



Muscles of Anterior Tibiofibular Region. 



Use cross-sections to complete this study. Study the contents 

 of the anterior tibiofibular osteofascial compartment. Clean 

 carefully each muscle and determine its form, position, origin, 

 insertion, action, and nerve supply. What are flexion and exten- 

 sion of the foot? Study 



(a) Anterior tibial muscle (M. tibialis anterior) (0. T. tibialis anticus). 



(b) Long extensor of digits (M. extensor digitorum longus). 



