. TOOTH-GRINDING. 11<> 



frequently it was inclined backwards, apparently 

 to preserve equilibrium, while the hands were held 

 out in front. Twitchings of the fingers * were very 

 commonly seen, the movements being usually of 

 independent digits, and most commonly either 

 lateral or flexor, less commonly extensor ; the lateral 

 movements appeared to be the most characteristic. 

 The tongue was usually very unsteady, but not 

 distinctly jerked in and out, as in chorea. T witch - 

 ings of the facial muscles were not very common. 



A certain passive condition of the hand and face 

 will be referred to presently. In a large proportion 

 of the cases, the teeth were found flattened on their 

 edges, as the result of " tooth-grinding ; " the teeth 

 mostly ground were the incisors and canines, but the 

 special teeth flattened depended upon their arrange- 

 ment in the jaws. The pupils were measured in 

 some cases with a catheter-gauge, after the mariner 

 suggested by Mr. Hutchinson. No special con- 

 clusion was arrived at ; on the average, they were 

 not large, except in a few cases near the age of 

 puberty. 



The nervous hand was found to be very common ; 

 the expression of headache in the face was fre- 

 quently seen, or rather, I should say, a certain 

 facial expression indicative of depression was 

 often observed, and, when seen, appeared to give 

 strong evidence, characterizing the child as the 

 subject of recurrent headaches. To analyze this 

 condition of the face, the faces of adults, the subjects 

 of migraine, were studied. The most noticeable 

 * See Figs. 12, la. 



