ARTICULATIONS OF THE POSTERIOR LIMBS. 



171 



Fig. 94. 



face. The two cuneiforms are joined by means of a small articular 

 surface. 



The fibrous fasciculi which maintain the diarthrodial surfaces in contact 

 are somewhat numerous. They are as follows : 



1. The astragalo-metatarsal ligament and tarso-metatarsal apparatus, 

 which will be described hereafter ; these two bands do not properly belong 

 to the articulations of the second row of bones. 



2. Two anterior ligaments, named cuboido-scaphoid and cuboido-cunean 

 (Figs. 93, 8 ; 94, 5), which are carried from the cuboid to the scaphoid 

 and to the great cuneiform bone, one above, 



the other below the vascular channel formed 

 between these three bones. 



3. Two inter osseous ligaments analogous 

 to the preceding two, forming the superior and 

 inferior walls of the aforesaid channel. 



4. An interosseous scaphoido-cunean liga- 

 ment, passing from the scaphoid to the two 

 cuneiform bones. 



5. An interosseous ligament, named the 

 intercunean, is directed from one cuneiform 

 bone to the other, and is confounded with the 

 preceding ligament. 



The disposition of the lubricating mem- 

 branes .varies with that of the articular facets. 

 The following is what is most generally 

 observed : A proper synovial membrane is 

 specially destined for the facets by which the 

 scaphoid and great cuneiform bones correspond ; 

 this synovial membrane belongs also to the two 

 cuboido-scaphoid and posterior cuboido-cunean 

 arthrodiae. The anterior cuboido-scaphoid diar- 

 throsis receives a prolongation from the syno- 

 vial membrane of the two rows. The play of 

 the anterior cuboido-cunean and intercunean 

 facets is facilitated by two prolongations of 

 the tarso-metatarsal synovial membrane. 



Movements almost null. 



ARTICULATION OF THE TWO Rows WITH EACH 

 OTHER. This arthrodial joint is formed by the 

 union of the calcis and the astragalus, on the 

 one side, with the scaphoid and cuboid bones 

 on the other. Its solidity is assured by six 

 principal bands : 



1. The two lateral superficial ligaments of 

 the tibio-tarsal articulation. 



2. The calcaneo-metatarsal ligament (Fig. 

 94, 3), a strong fibrous brace which unites the 



posterior border of the calcis to the cuboides. and to the head of the external 

 rudimentary metatarsal bone. It is confounded, outwardly, with the external 

 and superficial tibio-tarsal ligament; inwardly, with the posterior tarso- 

 metatarsal band. 



3. The astragalo-metatarsal ligament (Fig. 93, 7), a radiating fasciculus 

 whose fibres leave the internal tuberosity of the astragalus, become mixed 



ARTICULATIONS OF THE TARSUS; 

 LATERAL VIEW. 



1, External deep ligament; 2, 

 External superficial ligament ; 

 2', Ring furnished by the latter 

 ligament for the passage of the 

 lateral extensor tendon of the 

 phalanges ; 3, Calcaneo-meta- 

 tarsal ligament ; 4, Astragalo- 

 metatarsal ligament ; 5, Small 

 cuboido-cunean ligament. A, 

 Cuboidal insertion of the flexor 

 muscle of the metatarsus ; B, 

 Anterior orifice of the vascular 

 conduit of the tarsus ; c, Groove 

 on the external tuberosity of 

 the tibia for the gliding of the 

 lateral extensor of the pha- 

 langes ; D, Insertion of the gas- 

 trocnemius tendon of the leg 

 into the os calcis ; E, Gliding 

 surface for that tendon. 



