LAMENESS IN THE PHALANGEAL IlEGION. 63 



confounded with the iutersesamoidal ligaments, (l) The 

 fasciculi of the middle ligament are fixed on the posterior 

 imprints on the os suffraginis, and ascend to the base of 

 the sesamoids, where they end, (c) The bands of the deep 

 ligament are fixed to the base of the sesamoids and superior 

 extremity of the os suffraginis. The superior sesamoidal 

 . ligament, also called the suspensory ligament of the 

 fetlock, a powerful brace, is lodged behind the large 

 metacarpal bone. It is inserted superiorly to the lower row 

 of carpal bones and posterior face of the large metacarpal 

 bone. Its inferior extremity is bifid, the branches being 

 attached to the summits of the sesamoid bones. 



2. Pastern joint : This is an imperfect hinge joint. The 

 supei'ior surface of the os coronae shows behind a glenoidal 

 fibro cartilage, also two strong lateral ligaments passing 

 downward and backward, which are inserted into the 

 tubercles on the inferior extremity of the os sufi'raginis 

 superiorly', while they are attached to the sides of the os 

 coronae inferiorl}-. Their most inferior fibres reach the os 

 naviculare and constitute the posterior lateral ligaments of 

 the pedal articulation. This joint has a capsular ligament, 

 related anteriorly to the extensor pedis, laterally to the 

 ligaments ; posteriorly, it touches the suspensory ligament. 



3. Pedal joint : Is an imperfect hinge joint. There is 

 one interosseous ligament which fastens the navicular bone 

 to the OS pedis. The anterior lateral ligaments are attached 

 superiorly to the lateral imprints on the os coronae, and 

 inferiorly into the cavities at the base of the pyramidal 

 eminence of the pedal bone. The posterior ligaments are 

 the continuation of the lateral ligaments of the pastern 

 joint. The capsular ligament extends from the inferior 

 extremity of the os coronae to the os pedis and navicular 



