

756 



LIGAMENTS OF THE FOOT. 



The deltoid or internal lateral ligament (Fig. 247) extends 

 from the inferior margin of the malleolus intermis in a 

 radiated manner to the os calcis, naviculare, and astrag- 

 alus. 



The external lateral ligament is composed of three distinct 

 fasciculi, an anterior, posterior, and middle, all of which 

 extend from the external malleolus to the astragalus and 

 os calcis. There is the usual synovial membrane. 



LIGAMENTS OF THE FOOT. 



These comprise the tarsus, metatarsus, and. phalanges. 



The ligaments of the tarsus are divided into the dorsal 

 FIG. 248. and plantar. An interosseous ligament 



connects the astragalus and os calcis, and 

 is situated in the fossa between their ar- 

 ticular surfaces, and & posterior ligament 

 also unites them behind. 



The calcaneo-scaplioid (Fig. 248) is 

 double, consisting of an internal and ex- 

 ternal portion; both of these are on the 

 plantar surface. The internal consists of 

 a broad fibre-cartilaginous band, which 

 extends from the lesser tubercle of the os 

 calcis to the lower and inner surface of 

 the naviculare. It forms a trochlea for 

 the play of the tendons of the flexor lon- 

 gus pollicis and flexor digitorum. The 

 external portion extends from the greater 

 tubercle of the calcis to the external under surface of the 



naviculare. 



The calcaneo-cuboid (Fig. 248) is also double. The plantar 

 portion is large, and extends from the under surface of 

 the calcaneum to the cuboides, and even as far as the third 



FIG. 248 represents the Ligaments on the sole of the Foot, a Inferior sur- 

 face of the calcis. b Astragalus, c Scaphoides. d e Calcaneo-cuboid liga- 

 ment. / Calcaneo-scaphoid ligament, g Plantar ligaments, h h Tendon of 

 Peroneus longus. i i Tarso-metatarsal plantar ligaments, j Capsular liga- 

 ment of first joint of the great toe. fe Lateral ligaments of the first joints of 

 the toes 



