THE HOCK JOINT 



201 



fibulare longum et breve) consists of two distinct bands which cross each other. 

 The long (superficial) ligament arises on the posterior part of the external malleolus, 

 is directed almost straight downward, and is attached to the fibular and fourth 

 tarsal bones and the large and external small metatarsal bones. It forms a canal 

 for the lateral extensor tendon. The short (deep) ligament arises on the anterior 

 part of the external malleolus, is directed chiefly Imckward, and ends on the rough 

 excavation on the external surface of the tibial tarsal and the adjacent surface of 

 the fibular tarsal bone. 



The internal lateral ligament (Ligamentum collaterale tibiale longum et breve) 

 also consists of two ])arts which cross each other. The long ligament arises on the 

 posterior part of the internal malleolus, becomes wider below, and is attached on 

 the lower tuberosity of the tibial tarsal, the large and outer small metatarsal bones, 

 and the inner surface of the lower tarsal bones which it covers. The short ligament 

 lies largely under cover of the long one. It extends from the anterior part of the 

 internal malleolus runs backward and somewhat downward, and divides into two 



External lateral ligament 

 Plantar ligament 



Small metatarsal bones .^rrr: 



Large metatarsal bone - 



Long internal lateral ligament 

 Short internal lateral ligament 



Suspensory ligament 



Fig. 165. — Left Hock Joint of Horse, Posterior View. 

 31, Tibia; 34, tuber caicis. (After Ellenberger-Baum, Anat. fur Kunstler.) 



branches; one of these ends on the upper tuberosity on the inner surface of the 

 tibial tarsal bone, the other on the sustentaculum tali. 



The plantar or calcaneo-metatarsal Ugament (Ligamentum tarsi plantare) is a 

 very strong fiat band which covers the outer part of the posterior surface of the 

 tarsus. It is attached to the posterior surface of the fibular and fourth tarsal 

 bones and the proximal end of the external metatarsal bone. 



The dorsal or oblique ligament (Ligamentum tarsi dorsale) is a triangular 

 sheet which is attached above to the lower tuberosity on the inner face of the tibial 

 tarsal bone, and spreads out below on -the central and third tarsal bones, and the 

 proximal ends of the large and inner small metatarsal bones, to all of Avhich it is 

 attached. 



Special Ligaments. — A considerable number of short bands which connect 

 adjacent bones of the tarsus and metatarsus are described by various authors; 

 some of these are quite distinct ; others are difficult to isolate. Most of them are 

 not of sufficient importance to justify detailed description. 



