162 



ARTICULATIONS OF THE LOWER LIMB. 



One synovial membrane lines the calcaneo-talar joint, and another the 

 calcaneo-talo- scaphoid articulation. 



CALCANEO-CTJBOID ARTICULATION. The calcaneum is united to the 

 cuboid bone by a synovial joint and ligaments. 



The inferior ligament consists of two distinct fasciculi of fibres, differing 

 in form and attachments ; of which one is superficial, the other deep-seated. 

 The superficial part, called the long plantar ligament, is the longest of the 

 tarsal ligaments. Its fibres, attached behind to the inferior surface of the 

 calcaneum as far as the anterior tubercle, pass forwards, and are attached in 

 greater part to the tuberosity on the under surface of the cuboid bone ; 

 some of them are continued onwards, and terminate at the bases of the 

 third and fourth metatarsal bones, after covering the tendon of the peroneus 

 longus muscle. The short or deep-seated plantar calcaneo-cuboid ligament 

 lies close to the bones, being separated from the superficial part by some 

 cellular tissue. Its breadth is considerable, its length scarcely an inch. 

 One extremity is attached to the calcaneum in front of the long ligament, 

 the other (somewhat expanded) to the under surface of the cuboid bone, 

 internal to the tuberosity. 



The dorsal or superior ligament is a flat band of fibres which connects the 

 anterior and upper surface of the calcaueum with the adjacent part of the 

 cuboid bone. 



The internal or interosseous ligament is placed deeply in the hollow 

 between the astragalus and os calcia, and is closely connected with the 

 external calcaneo-scaphoid ligament. 



Fig. 140. 



Fig. 149. LIGAMENTS OF THE FOOT, FROM THE INNER SIDE. ^ 

 1, internal lateral ligament of the ankle ; x , in front of the sustentaculum tali, showing 

 part of the internal lateral ligament descending upon it ; 2, posterior talo-calcaneal liga- 

 ment ; 3, posterior ligament of the ankle-joint ; 4, part of the long and short calcaneo- 

 cuboid ligaments seen from the inside ; 5, two superior astragalo-scaphoid or talo-scaphoid 

 ligaments ; 6, internal talo-scaphoid ligament ; 7, internal scaphoido-cuneiform (first) ; 

 8, dorsal or superior cuneiform ; 9, scaphoido-cuneiform (second) ; 10, intercuneiform, or 

 transverse dorsal cuneiform, between the first and second cuneiform bones; 11, internal 

 or first tarso-metatarsal ligament ; 12, inferior first tarso-metatarsal ; 13, internal lateral 

 metatarso-digital : the internal sesamoid bone is seen below; 14, internal lateral digital 

 ligament (of the first toe) : those of the second toe are also seen beyond. 



