108 PHYSICAL EXPRESSION. 



teeth, or whistles ; the groove running from the nose 

 to the mouth is less marked than on the other side. 

 In studying any case of brain disease, it is very 

 desirable to localize the seat of lesion. The follow- 

 ing are briefly the principles employed in trying 

 to make such localization during the life of the 

 patient. It is impossible to make any scientific 



Fig. 10. Right Hemiplegia, with cerebral facial palsy, right side. The lace 

 is asymmetrical, and the muscles in the right lower zone about the mouth act 

 very indifferently. The naso-labial groove on this side is almost lost; this is well 

 seen on comparing the two sides. No asymmetry is seen in the upper and middle 

 facial zones. 



diagnosis of the locality of the lesion unless some 

 localizing symptoms be present. Now, the main 

 localizing symptoms are paralyses and spasms of 

 the muscles supplied with motor force from the 

 nerve-centres affected by the lesion. Destruction 

 of the corresponding mass of brain substance, in 

 different men, whether by haemorrhage or by 

 softening, paralyzes the same muscles in each, and 



