THE PAKATHYKOID GLANDS 531 



in the dog than in either the cat or monkey. In the dog the respiratory 

 muscles are often involved in these spasms, and artificial respiration is 

 sometimes necessary to restore breathing. Frequently the animal dies in 

 a fit of this kind. 



In some cases in the dog paresis appears as one of the earliest symp- 

 toms ; the animal is unable to stand and may lie prone on its belly with the 

 legs spread and no sign of spasticity. This, however, is not common. 



The condition of the reflexes is not characteristic ; sometimes they are 

 exaggerated, but often they are less easily elicited than normally; most 

 frequently they are normal. 



Sometimes the animal shows muscular disturbances resembling those 



Fig. 5. Record of tremors in hind- and fore-leg of dog, with complete section of 

 the spinal cord. Time in 0.1 sec. and in sees. (Noel Paton, Findlay, and Watson.) 



produced by a lesion of the cerebellum. This is more common in the cat 

 than the dog. 



Hyperpnea, which is common in the dog, is seldom seen in the cat. 



In the dog tachycardia is often present, but this is not marked in the 

 cat. 



Intestinal disturbances of a catarrhal nature are not uncommon in the 

 cat. 



A semiclosed condition of the eyelids, the opposite of that found in 

 exophthalmic goiter, described by Edmunds as a characteristic symptom, is 

 frequently seen in the cat. 



In monkeys, in which the postoperative condition is generally more 

 chronic than in cats or dogs, the course of the symptoms closely resembles 

 that of idiopathic tetany in the human subject, particularly in children. 



Relation of the Nervous System to Parathyroid Tetany. The re- 

 gions of the nervous system involved in the condition of parathyroid tetany 

 were investigated by Paton, Findlay, and Watson (&) (1916). They found 

 that the disturbance proceeds from the central nervous system, since divi- 

 sion of the motor fibers to any of the muscles will abolish it. Removal of 



