PHALANGE AL ARTICULATIONS. 171 



third between the os calcis and cuboid. The anterior 

 sacs are : The fourth, between the cuboid and fourth and 

 fifth raetatarsal ; the fifth, between the scaphoid and three 

 cuneiform; it extends forward between the middle and 

 external cuneiform, and expands so as to lie between the 

 middle and external cuneiform bones and the second and 

 third metatarsal; the sixth, the smallest, between the 

 internal cuneiform and first metatarsal. 



INTERMETATARSAL ARTICULATIONS. 

 LIGAMENTS : 



DORSAL. Pass across the bases of the metatarsal bones. 

 PLANTAR. Pass across the bases of the metatarsal 



bones. 



INTEROSSEOUS. Pass between the bases of the meta- 

 tarsal bones. 



METATARSO-PHALANGEAL ARTICULATIONS. 

 LIGAMENTS: 



PLANTAR. From the base of phalanx to the head of 



metatarsal bone. 



Two LATERAL. From the base of phalanx to the head 

 of metatarsal bone, laterally. 



PHALANGEAL ARTICULATIONS. 



The phalangeal articulations are like the metatarso- 

 phalangeal. 



A freely-movable joint is always provided with a 

 capsular ligament. Those joints having an interarticular 

 cartilage generally have two synovial sacs, except in the 

 vertebral articulations and in the knee-joints. 



When the synovial sacs and capsular ligaments are 

 greatly distended, the joints are flexed and fixed, simu- 

 lating a dislocation, thus: the elbow-joint is flexed at 

 right angles; in distension of the hip-joint the thigh is 

 adducted and strongly flexed. 



