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 ligament (Lig. collaterale tibiale) also consists of two parts which 
eross 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 
ies Short lateral ligament 
Plantar ligament - -Long lateral ligament 
Lk. 
is) 
Mt. IIT 
Mt. IV 
Fic. 253.—Ricat Hock Joint oF Horse; LaTerat View. THe CapsuLe 18 REMOVED. 
1, Ligament connecting lateral ridge of tibial tarsal with processus cochlearis of fibular tarsal bone; 2, groove for 
lateral extensor tendon; 7’. t., lateral ridge of trochlea of tibial tarsal bone; 7. c., central tarsal bone; 7. 3, third tarsal 
bone; Mt. III, Mt. 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 
