THE HOCK JOINT 



425 



ligament. The deep-seated external ligament, much shorter than the pre- 

 ceding, is attached superiorly upon the anterior part of the external tuber- 

 osity of the tibia ; it takes a course obliquely downwards, to the outer side 

 of the astragalus and os calcis, where it is attached. 



Fia. 5S. — External View of 

 THE Hock Joint. 



A. Tibia. 



B. External malleolus of tibia. 



C. Os calcis. 



D. Large metatarsal bone. 



E. Capsular ligament ojieiiecl and 



partially removed. 



F. Prominence in head of ex- 



ternal small metatarsal 

 bone, sometimes mistaken 

 for curb. 



G. Astragalus. 

 H. Cuboid bone. 



1. Scaphoid bone. 

 K. Cuneiform bone. 



2. 2. Calcaneo-tibial ligament. 



3 cfc 4. Ligaments between the 

 astragalus and os calcis. 



5. Cuboido-metatarsal ligament. 



6. Great calcaneo-cuboid liga- 



ment. 



The internal lateral ligaments. — These are three cord-like bands, of which 

 there is one superficial, one median, and one deep-seated. The sicperjicial 

 internal ligament, the strongest and largest of the three, arises from the 

 infero-internal tuberosity of the tibia, and inserts itself on the astragalo- 



FiG. 59. — Internal View C7 

 TUE Hock Joint. 



A. Tibia. 



B. Internal malleolus. 



0. Os calcis. 



D. Large metatarsal bone. 



E. Internal small metatarsal 



bone. 



F. External small metatarsal 



bone. 



G. Astragalus. 



H. Scaphoid bone. 



1. 1. Ligament common to the 



OS calcis, astragalus, and 

 internal small metatarsal 

 bone. 



2. Ligament between the tibia 



and astragalus. 



3. Calcaueo-astragalan ligament. 



4. Ligament between tlie astraga- 



lus and OS calcis. 



5. Calcaneo-cuboid ligament. 



6. Calcaneo-metatarsal ligament. 



metatarsal ligament, to the tuberosity on the internal surface of the astra- 

 galus, the small cuneiform bone, and to the internal borders of the two 

 remaining tarsal bones, viz. the scaphoid and cuneiform, and to the upper 

 and inner surface of the large metatarsal bone, and head of the inner small 

 splint bone. 2'he' median internal ligament is composed of two cords, 

 attached in common beneath the preceding, to the internal tuberosity of 



