TARSAL ARTICULATIONS. 163 



A separate synovial membrane lines this joint. 



ARTICULATIONS OF THE SCAPHOID, CUBOID, AND CUNEIFORM BONES, ONE 

 WITH ANOTHER. The scaphoid and cuboid bones are connected by a dorsal 

 ligament, composed of short thin fibres, extended obliquely between the 

 two bones ; a plantar, situated in the sole of the foot, and consisting of 

 transverse fibres ; and an interosseous ligament, which intervenes between 

 the bones, and is attached to their contiguous surfaces. When the bones 

 touch, which is not always the case, they present two small articulating sur- 

 faces, which are covered with cartilage, and have between them an offset 

 of the adjacent synovial membrane. 



The scaphoid and the cuneiform bones are held together by dorsal liga- 

 ments. It will be recollected that the scaphoid bone articulates with the 

 three cuneiform by the smooth faces on its anterior surface. The dorsal 

 ligaments, three in number, pass from the upper surface of the scaphoid to 

 the first, second, and third cuneiform bones, into which they are inserted. 

 Plantar bands are similarly disposed on the under surface of the bones, but 

 these are continuous with, or offsets from, the tendoa of the tibialis 

 posticus muscle. 



The cuboid and the external cuneiform bones are connected by a dorsal 



Fig. 150. 



21 '22. 



Fig. 150. LIGAMENTS OK THE FOOT, FEOM THE OUTSIDE AND DORSAL ASPECT. 3 

 1, lower part of the interosseous membrane; 2, lower anterior tibio-peroneal ligament; 

 3, lower posterior tibio-peroneal ligament; 4, middle part of the external lateral 

 ligament of the ankle-joint, passing to the calcaneum ; 5, anterior part of the external 

 lateral ligament of the ankle-joint, passing to the astragalus ; below the last ligament 

 the external calcaneo-talar ligament has not been represented in this figure ; 6, posterior 

 part of the external lateral ligament of the ankle-joint, passing to the astragalus ; 

 7, is placed above the interosseous calcaneo-talar ligament ; 8, dorsal calcaneo -scaphoid ; 

 9, dorsal calcaneo-cuboid ; 10, part of the long plantar or calcaneo- cuboid ; 11, superior 

 talo-scaphoid ; 12 and 13, second and third scaphoido-cuneiform, and between them one 

 of the intercuneiform ligaments ; 14, superior scaphoido-cuboid ; 15, placed on the 

 external cuneiform bone, points to the cuneo-metatarsal ligament of the third bone ; above 

 and below 15, are corresponding ligaments from the external cuneiform to the second 

 and fourth metatarsal bones ; 16, cuneo-metatarsal ligament, from the first cuneiform to 

 the second metatarsal bone; between 12, and 16, are seen the cuneo-metatarsal ligaments 

 which converge from the three cuneiform bones on the second metatarsal; 17, cuboido-meta- 

 tarsal ligament passing to the fourth metatarsal bone; 18, that to the fifth ; 19 and x x , 

 dorsal intermetatarsal ligaments ; 20, lateral metatarso-digital ; 21, 22, lateral digital. 



