358 SYNDESMOLOGY 



Synovial Membrane. The synovial membrane of these joints is part of the great tarsal synovial 

 membrane (Fig. 360). 



Movements. The movements permitted between these bones are limited to a slight gliding 

 upon each other. 



VI. Tarsometatarsal Articulations (Articulationes Tarsometatarseae). 



These are arthrodial joints. The bones entering into their formation are the 

 first, second, and third cuneiforms, and the cuboid, which articulate with the bases 

 of the metatarsal bones. The first metatarsal bone articulates with the first cunei- 

 form; the second is deeply wedged in between the first and third cuneiforms 

 articulating by its base with the second cuneiform; the third articulates with the 

 third cuneiform; the fourth, with the cuboid and third cuneiform; and the fifth, 

 with the cuboid. The bones are connected by dorsal, plantar, and interosseous 

 ligaments. 



The Dorsal Ligaments (ligamenta tarsomctatarsea dorsalia) . The dorsal ligaments 

 are strong, flat bands. The first metatarsal is joined to the first cuneiform by a 

 broad, thin band; the second has three, one from each cuneiform bone; the third 

 has one from the third cuneiform; the fourth has one from the third cuneiform 

 and one from the cuboid; and the fifth, one from the cuboid (Figs. 354, 355). 



The Plantar Ligaments (ligamenta tarsometatarsea plantaria) . The plantar liga- 

 ments consist of longitudinal and oblique bands, disposed with less regularity 

 than the dorsal ligaments. Those for the first and second metatarsals are the 

 strongest; the second and third metatarsals are joined by oblique bands to the 

 first cuneiform; the fourth and fifth metatarsals are connected by a few fibers 

 to the cuboid (Fig. 358). 



The Interosseous Ligaments (ligamenta cuneometatarsea interossia) . The inter- 

 osseous ligaments are three in number. The first is the strongest, and passes from 

 the lateral surface of the first cuneiform to the adjacent angle of the second meta- 

 tarsal. The second connects the third cuneiform with the adjacent angle of the 

 second metatarsal. The third connects the lateral angle of the third cuneiform 

 with the adjacent side of the base of the third metatarsal. 



Synovial Membrane (Fig. 360). The synovial membrane between the first cuneiform and 

 the first metatarsal forms a distinct sac. The synovial membrane between the second and third 

 cuneiforms behind, and the second and third metatarsal bones in front, is part of the great tarsal 

 synovial membrane. Two prolongations are sent forward from it, one between the adjacent sides 

 of the second and third, and another between those of the third and fourth metatarsal bones. 

 The synovial membrane between the cuboid and the fourth and fifth metatarsal bones forms a 

 distinct sac. From it a prolongation is sent forward between the fourth and fifth metatarsal bones. 



Movements. The movements permitted between the tarsal and metatarsal bones are limited 

 to slight gliding of the bones upon each other. 



Nerve Supply. The intertarsal and tarsometatarsal joints are supplied by the deep peroneal 

 nerve. 



VII. Intermetatarsal Articulations (Articulationes Intermetatarseae). 



The base of the first metatarsal is not connected w y ith that of the second by any 

 ligaments; in this respect the great toe resembles the thumb. 



The bases of the other four metatarsals are connected by the dorsal, plantar, 

 and interosseous ligaments. 



The Dorsal Ligaments (ligamenta basium [oss. metatars.] dorsalia) pass transversely 

 between the dorsal surfaces of the bases of the adjacent metatarsal bones. 



The Plantar Ligaments (ligamenta basium [oss. metatars] plantaria). The plantar 

 ligaments have a similar arrangement to the dorsal. 



The Interosseous Ligaments (ligamenta basium [oss. metatars.] interossea). The 

 interosseous ligaments consist of strong transverse fibers which connect the rough 

 non-articular portions of the adjacent surfaces. 





