232 



VETERINARY PHYSIOLOGY 



1st Class. — Fulcrum between power and weight. In the 

 ankle this is seen Avhen, by a contraction of the gastroc- 

 nemius, we push upon some object with the toes. 



2nd Class. — Weight between fulcrum and power. In 



M. interosseus 



Third metacarpal bone 



M. flexor digitorum 

 sublimis 



Sesamoid bone - 



M. flexor digitorum 

 profundus 



M. extensor digitorum communis 



' Ergot ' 



4 - 



Ligg. sesamoidea obliqua 

 Lig. sesamoideum rectum 



M. flexor digitorum profundus ^ 



Sesamoid 



5 



Lig. plialangosesamoideum 



Second phalanx 

 3' 



Third phalanx 



Wall of hoof 

 Laminar matrix 



Terminal arch of 

 digital vessels 



Sole 



Cuneus ("frog") 



Cuneate matrix 



Digital torus Solar matrix 



Fig. 116. — Longitudinal Section of Digit. 



1 and 1', 2 and 2', .3 and 3' = Joint capsules. 4 = Synovial sheath of 

 flexor tendons. o = S3'novial sheatii of deep flexor tendon. {From 

 " The Limbs of the Horse." Bradley.) 



rising on the toes, the base of the metatarsals is the fulcrum, the 

 weight comes at the ankle and the power on the os calcis. 



