NERVOUS SYSTEM. 219 



down and inability to get up again, sometimes attacks of raving 

 madness. Temperature frequently increased, but fever may be 

 absent. Feeding always more or less interrupted, especially the 

 manner of feeding 



Blind staggers. Morosis equorum. Hydrocephalus chronicus. 

 This is a chronic apyretic incurable affection of the cerebrum which 

 manifests itself by mental disturbances, and by impaired locomo- 

 tion and sensibility. Pulse strong and full, number of heart beats 

 never increased, but frequently diminished — a very constant symp- 

 tom. Appetite usually good but animal eats slowly Ability 

 to work present to a limited degree. Examination for staggers. 



Overheating (Hyperthermia) and Sunstroke (Insolatio). Ex- 

 haustion, dullness, unsteady gait; in the beginning, perspiration, 

 abating and followed by increased bodily temperature. Death 

 frequent, from cardiac paralysis. 



Chorea. St. Vitus' Dance. Continuous, usually incoordinated, 

 rarely apparently coordinated, involuntary, jerky movements of 

 limbs or portions of the body. 



Epilepsy. "Falling sickness" is a chronic disease of the brain 

 characterized by paroxysms occuring at intervals and attended 

 by sudden loss of consciousness and disturbed sensibility. 



Dizziness, vertigo. This is a primary disease, occurring at 

 intervals, characterized by interrupted equilibrium and due to cir- 

 culatory disturbances in the brain. 



Cerebral hemorrhage. Apoplexy. Sudden dizziness, involun- 

 tary movements, loss of consciousness, falling down, paralysis 

 (hemiplegia and monoplegia). 



Eclampsia is an acute epilepsy, ending in recovery or in death. 



Turnsick is a disease of sheep caused by the presence of the 

 larval form of Tenia coenurus in the brain. 1st stage, cerebral 

 excitement; 2nd stage, latent stage; 3rd stage is that of turnsick, 

 characterized by symptoms of local brain affections. 



Paralysis of the facial nerve. In case of peripheral paralysis 

 the cheeks, lips and nasal muscles are paralyzed, usually unilater- 

 ally; if paralysis is bilateral we have dyspnea and difficulty in 

 feeding. In case of central paralysis the upper eyelids droop, 

 eyes cannot be closed and the auricular muscles are affected. 



Lumbar prurigo of sheep is a chronic, hereditary affection of 

 the spinal cord characterized by hyperesthesia, weakness and 



