156 



DISEASES OF THE BONES AND ARTICULATIONS. 



gallop, where the animal is more kept up to the bridle, and 

 the weight thus thrown more directly upon the upper extremity 

 of the bone, and is thence transmitted to the seat of splint, in 

 the same way as a blow will cause an indirect fracture, as already 

 explained. As a rule, the inner side 

 of the upper third of the metacarpals 

 is the seat of splint ; but, owing to 

 peculiarity of form and shape of the 

 leg, the deposit may be found upon the 

 outer side, or both upon the inner and 

 outer, and middle aspect of the limb. 

 Perci vail describes five classes of splints : 

 1st. Simple. 



2d. Double or pegged splints ; that 

 is, those which are found upon botli 

 aspects of the limb, with an osseous 

 communicating bar running from one 

 to the other. 



3cl. Those close to the knee. 

 Ath. Consisting of two or more 

 exostoses upon one side of the leg, 

 one above the other, with perhaps an 

 osseous communication. 



5th. Little bony excrescences, in- 

 volving the knee-joint, namely, the 

 head of the metacarpus minor inter- 

 "^thTmetaS^ai^^^!^' ^^^^ ^^^'^^P^^^^^^' ^^ mctacarpus 



bones, a, Inter- metacarpal groove, miuor extemUS, and uncifomi. 



Lr°t\°oS:ot X^x A ^""pi« «pii"t' ^^-i'^" ™t "^="8 



volving the extremities of the lamcucss, and in a position removed 

 m2rhgaments.''J!rrirr'egu- f^'om either articuktion or tendon, is 

 lar ossifications, involving the not lookcd upou as an unsoundness, 



small metacarpals, lower end of , . ,, , , ,, r , , ■, . 



large metacarpal, and forming but all tlie Othcr forms.must be claSSl- 



points of attachment to the supe- fied as causes of unsoundncss, as they 



rior sesamoidean ligament above , . . tit. i 



its bifurcation. are at any time liable to cause lame- 



NoTE.— The more important por- ness«; and are indicative of more 



tions of this form of splint, namely, ... , . i_ •J_^ i_ j.i 



those invoivinK the ligamentous stnic- discasc than IS apparent either to the 



tures, are hidden from view in the , i /. , i • t 



living suiiject. ejQ or touch 01 the examiner ; disease 



involving articulating surfaces, ligamentous structures, or inter- 

 ferinfT with the movement of a tendon. 



Fig. 22. 

 involving the 



