48 EQUINE ANATOMY. 



Posterior, from posterior face of femur to tibia. In relation to 

 external gastrocnemius and popliteal artery. 



CruciaL 



{a) Anterior or external from front of tibial spine to inner 

 side of external condyle. 



(<^) Posterior or internal, in opposite direction. 



Interarticular fibro-cartilages (or menisci), {a) right and {b) 

 left attached to tibial spine, and by fasciculi to femur and tibia. 



Synovial membt'ane. 



(a) Middle portion under patella. 



{b^ Lateral portions under lateral ligaments. 



Action. 



Flexion, extension and rotation on menisci. 



TIBIO-FIBULAR ARTICULATION. 



k planiform diarthrosis, between tibia and fibula. 



Ligaments. 



Two lateral fasciculi, from sides of fibula to tibia. 

 Interosseous, between two bones, leaving a space railed tibio- 

 fibular arch. 



Action. 



Limited. 



HOCK OR TARSAL ARTICULATION. 



Tibio -tarsal. 



A gingfyfnus, between lower end of tibia and astragalus. 



Ligaments. 



Anterior. — From front of tibia to astragalus, scaphoid, great 

 cuneiform bones and astragalo- metatarsal ligament. 



Internal lateral. 



{a^ Superficial fasciculus, from inner extremity of tibia to sides 

 of tarsus and metatarsus. 



( b ) Middle fasciculus. 



Tibial tuberosity to astragalus and calx. 



( c ) Deep fasciculus. 



From tibia to astragalus. » 



External lateral. 



{a) Superficial \)Oxt\on, from tibia to sides of tarsus and meta- 

 tarsus. 



