8 Veterinary Medicine. 



Polyuria is determined by section of one point of the medulla 

 behind the root of the vagus, mellituria by puncture between the 

 vagus and auditory nerves (the hepatic vaso-motor centre), and 

 albuminuria by a puncture in front of the latter. Impairment of 

 the hepatic vaso-motor tracts in the spinal cord, or of the anterior 

 or posterior cervical sympathetic ganglia, or of the first thoracic 

 ganglion equally determines nervous mellituria. 



Poisonous milk produced in hard worked mares, or over-ex- 

 cited dams of other species, causing dyspepsia, diarrhoea, arthritis 

 or other trouble in the suckling, must be in part attributed to 

 nervous disorder. 



Practically all secretions and nutrition are largely under nerv- 

 ous control, so that modifications in quantity or quality can often 

 be attributed to nervous influence. 



SENSORY SYMPTOMS AND DISORDERS. 



Hypersesthesia, cutaneous, thermic, muscular, visceral. Parsestbesia, 

 pressure on nerve. Anaesthesia, partial, drug. Analgesia. Hyperalgesia. 



These are necessarily much less obvious to the veterinarian 

 than to the physician of man. Yet in certain cases they may be 

 observed directly, and in others deduced from dependent symp- 

 toms. 



Hyperaesthesia is a state of exalted excitability of any part of 

 the sensory nervous apparatus. 



Cutaneous hypersesthesia is that condition in which the 

 slightest touch gives rise to an instant and extreme response. 

 Some nervously organized mares which are dangerously ticklish 

 and irritable, afford physiological examples. The surface sore- 

 ness and sensitiveness which exist in the febrile chill, in wounds, 

 dermatitis and neuralgia give pathological examples. It is further 

 seen in certain cases of meningitis (cerebral and spinal), spinal 

 irritations, rabies, tetanus and neuritis. 



Hypersesthesia in cold is seen in neuralgia, rheumatism, the 

 early stages of many fevers (chill), in myelitis, neuritis, nerve 

 injuries, and in posterior (superior) spinal sclerosis. 



Hyperaesthesia of the muscles raay be noted in tetanus, 

 muscular rheumatism and neuralgia. 



