- 708 



Coniiiressioii of the S]»iiuil Cord. 



Both large and small animals lie down a lot, are easily 

 fatigued, and during movement it is quite olwious that the 

 limbs are neither lifted nor flexed as much as usual. The lat- 

 ter is especially obvious in the hind limbs, but sometimes also 

 in the fore limbs. In consequence of this abnormality of move- 

 ment, the hoof wall in the large animals, and the toes in the small 

 are dragged along the ground, especially if the ground be un- 

 even. In dogs the dorsal surface of the toes may be sore. 

 In the later stages, animals walk on the dorsal surface of the 

 phalanges or all the joints knuckle over at the moment when 



Fig. 101 



alysis of the hind quarters. 



any weight falls on the limb. In still later stages, this symptom 

 is observed ^vhile the animal is standing still, or during the pas- 

 sage of urine. After a variable interval, the paralysis pro- 

 gresses to such an extent that the animal can no longer get up 

 or walk. Pressure upon the croup is sufficient to cause them to 

 show signs of falling, and in small animals pressure upon the 

 sacrum causes them to fall powerless to the ground. Finally, 

 in some cases in which there is no paralysis of the fore legs, 

 the animals tend to drag the paralyzed hind quarters after them. 

 Associated with the gradually progressive symptoms of pa- 



