32 



HORSESHOEING. 



Of the three phalangeal articulations, the pedal is the only 

 one that permits of any lateral movement ; hence it is an im- 

 perfect hinge-joint. 



C. The Locomotory Organs of the Foot. 



Though the musch 



^L^ 



are the organs which produce motion, 

 the horseshoer need con- 

 cern himself only with 

 the tendons of those 

 muscles which extend 

 and flex the phalanges. 

 These tendons are 

 either extensors or flex- 

 ors. The extensors lie on 

 the anterior face and the 

 flexors on the posterior 

 face of the phalanges. 



The anterior exten- 

 sor of the phalanges 

 (Fig. 14, a) extends 

 the long and short pas- 

 terns and the hoof -bone ; 

 it is broad, and made 

 somewhat broader by rer 

 ceiving the branches of 

 the suspensory ligament 

 {V) that come from the 

 sesamoid bones. It takes 

 a firm attachment on 



Right forefoot viewed from in front and from the ex- ^^ pyramidal eminence 



ternal side: a, anterior extensor tendon of the toe; h, ^ "^ 



suspensory ligament of the fetlocli; fc', branch of the of the OS pcdis. In the 



same passing forward and uniting with the extensor n j; i -i 



tendon of the toe ; c, extensor tendon of the os suffraginis lOreleet the lOUg paS- 



(absent in the hind leg), called the lateral extensor. ^^^^^ ^^^ ^ ^^^^.^^ ^^^^^_ 



sor tendon (c), which is known as the lateral extensor. When the 

 muscles to which these tendons are attached act, — that is, when 



