170 PRACTICAL ANATOMY. 



Insertion Ridge on cuboid and second, third, and 



fourth metatarsal. 

 PLANTAR, SHORT CALCANEO-CUBOID. 



Origin Very deep, inferior surface of os calcis, 



anterior to tubercles. 

 Insertion Inferior surface of cuboid. 



2. Between the os calcis and scaphoid. 

 LIGAMENTS : 



SUPERIOR. 



Origin Inner side of os calcis. 



Insertion Outer side of scaphoid. 

 INFERIOR (broad and thick). 



Origin Anterior inferior side of os calcis. 



Insertion Inner surface of scaphoid. 



3. Between the astragalus and scaphoid. 

 LIGAMENTS: 



CAPSULAR. 



Origin Neck of astragalus. 



Insertion Margin of articular surface of scaphoid. 



TARSO-METATARSAL ARTICULATIONS. 

 LIGAMENTS: 



DORSAL. Pass from the tarsal to the metatarsal bones. 

 PLANTAR. Pass from the tarsal to the metatarsal bones. 

 THREE INTEROSSEOUS. Pass between the tarsal and 

 metatarsal bones. 



TARSAL SYNOVIAL MEMBRANES. 



There are six distinct synovial sacs in the tarsal 

 articulations, three posteriorly and three anteriorly. 

 The posterior sacs are located as follows: The first be- 

 tween the astragalus and os calcis, behind the interosseous 

 ligament ; the second between the astragalus and os calcis, 

 anterior to the interosseous ligament, and passing upward 

 and inward between the astragalus and scaphoid; the 



