MUSCLES OF THE ARM AND FORELEG 



449 



blends. Action — to assist the pc^forans and pcrforatus in flexing the 

 knee, etc. 



ExTENKOK SUFFEAGINIS is situatcd ou the postcro-extenial part of the 



Fig. 65.— View of the E\terisal Mi-scles of the Haunch and Thigh. 



1. Gluteus maximus. 



2. Gluteus externus. 



3. Tensor vaginae femoris. 



4. Vastus externus. 



5. 5. 5. Triceps abductor femoris. 



6. 7. Biceps rotator tibialis, or semi-membra- 



nosus and semi- 



8. Extensor pedis. 



9. Peroneus. 



10. Plantaris. 



11. Gastrocnemius intemns. 



12. Gastrocnemius externus. 



forearm. Origin — from a tubercle in the posterior and external part 

 of the radius; from the above bone as far down as the ulna reaches, 

 and from the shaft border of the ulna. Iiisertion — to the supero-antei'ior 

 part of the os suffraginis, and to the capsular ligament of the fetlock 

 joint. Action — to extend the fetlock. 



