242 THE ARTICULATIONS OF THE HORSE 
above to the distal tuberosity on the medial 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 outer small metatarsal bones, to all of which it is attached. 
Special Ligaments.—A considerable number of short bands which eonnect 
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. 
Tuber caleis 
Lateral malleolus 
Short lateral ligament 
Trochlea of tibial tarsal 
bone 
Tf. Tt. 
_ Dorsal ligament 
T.4 TeGs 
PAS 
woe Mt. TTT 
Mt. IV 
Fic. 254.—Ricur Hock Joint or Horse. Virwep FROM THE FRONT AND SLIGHTLY LATERALLY AFTER REMOVAL OF 
Joint CAPSULE AND LONG COLLATERAL LIGAMENTS. 
T.t., Tibial tarsal bone (distal tuberosity); 7’. c., central tarsal bone; 7. 3, ridge of third tarsal bone; 7. f., fibular tarsal 
bone (distal end); 7’. 4, fourth tarsal bone; Mt. III, Mt. IV, metatarsal bones. Arrow points to vascular canal. 
(1) The tibial and fibular tarsal bones are united by four bands (astragalo-caleaneal liga- 
ments). The medial ligament extends from the sustentaculum tali to the adjacent part of the 
tibial tarsal, blending with the short collateral ligament. The lateral ligament extends from the 
cochlear process of the fibular tarsal to the adjacent part of the lateral ridge of the trochlea. 
The proximal ligament extends from the posterior margin of the trochlea to the fibular tarsal. 
The interosseous ligament is deeply placed in the sinus tarsi between the two bones, and is at- 
tached in the rough areas of the opposed surfaces. 
(2) The smaller bones are attached to each other as follows: The central and third tarsal are 
united by an interosseous and an oblique dorsal ligament (scaphoido-cunean ligaments). The 
central and fourth tarsal are united by an interosseous and a lateral transverse ligament (cuboido- 
scaphoid ligament). The third and fourth tarsals are similarly connected (cuboido-cunean liga- 
ments). The third tarsal is joined by an interosseous (intercunean) ligament to the (fused) first 
and second tarsals; the latter are connected with the fourth tarsal by a plantar transverse liga- 
ment. 
(3) The smaller bones are connected with the proximal row as follows: The central is 
I. 
