Chap. VII] 



MUSCULAR TISSUE 



113 



Functionally we might group the most important muscles of the 

 lower extremities as follows : — 



Name of Muscle 



Moving 



the ^ 

 Thigh 



Moving 

 the 



Leg 



Moving 

 the 

 Foot 



Psoas magnus 

 Iliacus 



Gluteus maximus 



Gluteus medius 



Gluteus minimus 



Adductor magnus 

 Adductor longus 

 Adductor brevis 

 Adductor gracilis 



Sartorius 



Biceps 



Semitendinosus 



Semimembranosus 



Rectus femoris 

 Vastus externus 

 Vastus internus 

 Vastus intermedius 



Tibialis anterior 

 Peroneus tertius 



Tibialis posterior 



Gastrocnemius 



Soleus 



Peroneus longus ■ 

 Peroneus brevis 



Location 



I In the pelvis and 

 I upper part of thigh 



Region of buttocks 



Under gluteus maxi- 

 mus 

 Under gluteus medius 



•i Mesial part of thigh 

 Mesial part of thigh 



Function 



Front of thigh 



§ Back of thigh 



■^ Front of thigh 



& 



Front of leg 



\ Back of leg 



Outer part of leg 



Flexion and out- 

 ward rotation 



Extension, out- 

 ward rotation 

 and adduc- 

 tion. 



Abduction and 

 inward rota- 

 tion. 



Addud, rotate 

 and flex thigh. 



Adducts thigh 

 and flexes the 

 leg. 



Flexes leg, helps 

 in rotation 

 and abduc- 

 tion of thigh. 



Flexors of knee, 

 rotate leg in- 

 ward, extend 

 thigh. 



Extension of 

 leg, flexes the 

 thigh. 



Flexors. 



Extensors. 



Psoas magnus. — The great loin muscle arises from the last 

 thoracic and all the lumbar vertebrae with the included inter- 



