21)4 ANATOMY IN A NUTSHELL. 



of two main parts. First a superficial part which is attached by its apex to the 

 internal malleolus and by its base to the inner side of the astragalus and the 

 sustentaculum tali posteriorly, while anteriorly it is attached to the tuberosity 

 of the scaphoid and blends with the inferior calcaneo-scaphoid ligament. The 

 second, a deep portion which passes from the apex of the malleolus to the side 

 of the astragalus. 



The external lateral ligament consists of three portions. The first is an 

 anterior fasciculus which passes between the front of the external malleolus and 

 the side of the astragalus in front of the superior articular process. 



The second is a middle fasciculus which passes from the apex of the external 

 malleolus to the outer side of the os calcis. 



The third is a posterior fasciculus which is attached behind the deep groove 

 on the posterior part of the outer malleous and from this point passes inward 

 to a depression on the posterior surface of the astragalus. 



The synovial membrane of the ankle-joint lines the inner surfaces of its 

 ligaments, and from there it is reflected on the two articular surfaces of the 

 hones forming the joint. It sends a prolongation into the inferior tibio-fibular 

 articulation. 



The ligamentous muscles of the ankle-joint are all the muscles from the 

 knee to the ankle except the Popliteus. 



The nerve supply is the anterior tibial, posterior tibial and internal saphen- 



ous. 



The blood supply is the anterior tibial, posterior tibial and peroneal. 



LESSOX l.V. 

 Tin. Joints of the Tarsus. (Plates LXXXVII-LXXXVIII.) 

 All these joints are arthrodial except the articulation between the navicu- 

 lar and the astragalus, which is an enarthrodia! joint. 



Till. LIG WIE.XTS BETWEEN THE < >S CALCIS AND THE ASTRAGALUS ARE: 



1 Anterior calcaneo-astragaloid ligament. 

 I : ' sseous calcaneo-astragaloid ligament. 

 (3) Externa] calcaneo-astragaloid ligament. 



THE LIGAMENTS BETWEEN THE OS CALCIS AND SCAPHOID ARE: 



(1) Superior or dorsal calcaneo-scaphoid ligament. 



(2) Inferior calcaneo-scaphoid ligament. 



Ib.TU l.l.X THE ASTRAGALUS AXH THE SCAPHOID THERE IS RUT ONE LIGAMENT. 



1 I The superior or dorsal astragalo-scaphoid ligament. 



Till. LIGAMENTS BETWEEN THE SCAPHOID, CUBOID, AND THE THREE CUNEI- 

 I ORM are: 



(1) Superior or Dorsal scapho-cuboid ligament. 

 -' Superior or Dorsal scapho-cuneiform ligament. 



(3) Superior or Dorsal intercuneiform ligament. 

 1 Superior or Dorsal cubo-cuneiform ligament. 



(5) Internal lateral scapho-cuneiform ligament. 



The plantar ligaments are similarly arranged upon the bottom of the 

 foot. 



