162 ORIGIN, INSERTION, AND USE OF THE MUSCLES. 



ANTERIOR CRURAL REGION. 



FLEXOR METATARSI • 



Lies in contact with the anterior part of the tibia. 



Origin. — By a tendon blended with the extensor pedis, 

 from the lower part of the external condyle of the os femo- 

 ris, and by fleshy fibres from the fore part of the tibia. 



Insertion. — Into the head of the large metatarsi. The 

 tendon itself, as it emerges from the theca, splits into two : the 

 smaller one is implanted into the large metatarsi ; the larger 

 winds round the inward part of the hock, and is fixed on the 

 os metatarsi. 



Use. — To bend the hock and turn its point inwards. 



EXTENSOR PEDIS. 



Origin. — From the upper and fore part of the tibia, and 

 lower part of the external condyle of the os femoris. Its 

 fibres end in a flat tendon, a little above the hock, just as it 

 descends in company with the peroneus to the large pastern 

 joint ; above the latter, they disunite, and run separate : in 

 their course, both are invested in a cellular sheath. In front 

 of the fetlock joint this tendon spreads out, and its fibres con- 

 tinue to expand in its passage over the pastern and coffin 

 joints. 



Insertion. — Into the coronal process of the os pedis, and 

 along the upper edge of the bone between the attachments 

 of the lateral cartilage. 



PERONEUS. 



Origin. — From the head of the fibula, and the whole 

 length of the bone. 



Insertion. — With the former muscle. 



