MYOLOGY 133 



Vastus internus. 

 To extend the leg upon the knee : 



Vastus internus. 

 To flex the leg upon the thigh : 



Biceps flexor cruris, 



Semitendinosus, 



Semitendinosus accessorius, 



Semimembranosus. 

 To pull the tail down and to one side: 



Femoro-caudal. 

 To pull the head of the femur backward: 



Obturator externus. 

 To act as a posterior stay to the head of the femur: 



Obturator internus. 

 To pull the pelvis forward and to steady it on the head of the femur: 



Gemellus, 



Obturator internus, 



Obturator externus. 

 To extend the metatarsus on the tibia: 



Gastrocnemius, 



Soleus, 



Tibialis posticus. 

 To flex the toes: 



Peroneus longus, 



Flexor perforatus medius primus pedis, 



Flexor perforatus indicis secundus pedis, 



Flexor perforatus medius secundus pedis, 



Flexor perforatus indicis primus pedis, 



Flexor perforans digitorum profundus, 



Flexor longus hallucis, 



Flexor perforatus annularis primus pedis. 

 To flex the metatarsus on the tibia : 



Tibialis anticus. 

 To extend the toes: 



Extensor longus digitorum, 



Extensor hallucis brevis. 

 To flex the back laterally and to aid in raising the body. 



Sacro-lumbalis, 



Longissimus dorsi. 

 To elevate the tail: 



Levator coccygis, 



Levator caudae. 

 To depress the tail: 



Depressor caudae, 



Infracoccygis. 



Together- 

 Depressor coccygis, 

 Lateralis caudae. 



