PARALYSIS OF THE NERVES 



253 



the right ear when the animal was called, or his attention attracted, the 

 animal ate with difficulty but drank water normally. The cause of this 

 condition was not defined. The animal was treated with the faradic 

 current and in ten days was discharged cured. A number of observers 

 report favorable recoveries. 



Motor Paralysis of the Trigeminus. Paralysis of the Masseter Muscle. 

 Submaxillary Paralysis. — This form of paralysis is a common symptom 

 of rabies; therefore all cases of this kind must be regarded with suspicion. 



It is observed following distemper, in hemorrhagic gastro-enteritis, 

 and also as a result of certain forms of bacterial poisons, and also in some 





Fig. 97. — Facial paralysis of the left side. 



affections of the brain, morbid processes at the base of the cranium, such 

 as hemorrhages, neoformations, gliosarcoma. It would appear at times 

 as if the motor nuclei of the trigeminus are sciueezed by the muscles of mas- 

 tication, for instance when great effort is made to bite and crush partic- 

 ularly large bones. Rheumatic influences are also said to cause it. 



The chief symptoms are as follows: the mouth remains open, the in- 

 ferior maxillary hanging limp; if paralysis continues for any length of 

 time, the muscles atrophy. Recovery is rare. 



Paralysis of the Radial Nerve. — This is very rare and occurs as a re- 

 sult of traumatism or a sequela to distemper or cold. As the radial nerve 

 controls the muscles of extension of the leg, the anconeus muscle and 

 extensor muscles of the forearm the animal is unable to extend the leg but 



