156 ORIGIN, INSERTION, AND USE 



EXTENSOR PEDIS 



Takes the same course as the last described muscle. In 

 passing over the front of the cannon, it is tied down by cel- 

 lular membrane, and in front of the fetlock and pastern ; it 

 adheres to and strengthens the capsular ligaments of those 

 joints. 



Insertion. — By an expansion of its tendon, into the lower 

 end of both pasterns, and coffin bone. 



Use. — To extend the foot and pasterns, and assist in. the 

 extension of the knee. 



EXTENSOR SUFFRAGINIS. 



Origin. — From the upper and outer part of the radius and 

 ulnar. 



Insertion. — Into the upper end of the large pastern. 

 Use. — To assist in extending the knee and fetlock. 



EXTENSOR METACARPI OBLIQUE. 



Origin. — From the outward part of the body of the 

 radius. 



Insertion. — Into the upper part of the os metacarpi. 



MUSCLES OF THE HIND EXTREMITY 



Are invested with a dense, strong, and tendinous fascia upon 

 the fore, outer, and back parts ; but it is thin, weak, and cel- 

 lular upon the inside of the limb. Its chief attachments are 

 to the ileum, the pubes, the ossa coccygis, and the stifle ; it 

 is continuous superiorly with the aponeurosis of the external 

 oblique, and with the fascia lumborum. 



MUSCLES OF THE HAUNCH. 



ANTERIOR FEMORAL REGION. TENSOR VAGINA. 



Origin. — From the anterior spinous process of the ileum 

 and fascia lata. About midway between the pelvis and stifle, 



