THE HOCK JOINT 



241 



laterale breve) is deeper: it arises on the anterior part of the lateral malleolus, is 

 directed chiefly backward, and ends on the rough excavation on the lateral surface 

 of the tibial tarsal and the adjacent surface of the fibular tarsal bone. 



The medial Ugament (Lig. collaterale tibiale) also consists of two parts which 

 cross each other. The long medial ligament (Lig. collaterale mediale longum) 

 is superficial; it arises on the posterior part of the medial malleolus, becomes wider 

 below, and is attached on the distal tuberosity of the tibial tarsal, the large and 

 medial small metatarsal bones, and the surface of the lower tarsal bones which it 



Tuber calcis 



Plantar ligament 



Mt. IV 



ligainent 

 Ugaine?it 



Fig. 253. — Right Hock Joint of Horse; Lateral View. The Capsule is Removed. 

 1, Ligament connecting lateral ridge of tibial tarsal with processus cochlearis of fibular tarsal bone; 2, groove for 

 lateral extensor tendon; T. t., lateral ridge of trochlea of tibial tarsal bone; T. c, central tarsal bone; T. 3, third tarsal 

 bone; Mt. Ill, ML IV, metatarsal bones. 



covers. The short medial ligament (Lig. collaterale mediale breve) lies largely 

 under cover of the long one. It extends from the anterior part of the medial malleo- 

 lus, runs backward and somewhat downward, and divides into two branches; one 

 of these ends on the proximal tuberosity on the medial surface of the tibial tarsal 

 bone, the other on the sustentaculum tali. 



The plantar ligament (Lig. tarsi plantare)^ is a very strong, flat band which 

 covers the outer part of the plantar surface of the tarsus. It is attached to the 

 plantar surface of the fibular and fourth tarsal bones and the proximal end of the 

 lateral metatarsal bone. 



The dorsal ligament (Lig. tarsi dorsale)^ is a triangular sheet which is attached 



' Also termed the calcaneo-metatarsal ligament. ^ Also known as the oblique ligament. 



16 



