COLOURED VISION WITH HEADACHE. 121 



accompanies headache ; it appears common to other 

 conditions of depression. 



Having attempted to demonstrate that we may 

 ascertain something of the condition of the brain in 

 these nervous children by observing these muscular 

 movements, we may now look for signs of irritation 

 of the cranial nerves. Evidence of disturbance of the 

 motor division of the fifth nerve is seen in the great 

 frequency of tooth-grinding ; the condition of the 

 muscles supplied by the facial and hypoglossal nerves 

 has been referred to. Irritation of the pneumogastric 

 nerve appears to be indicated by many symptoms. 

 The varying appetite, which is often voracious, 

 though nutrition is deficient, while at other times 

 it is markedly defective, the frequent epigastric pain, 

 and the retching or vomiting with headache, appear 

 to indicate disturbance of" the gastric branches; 

 occasional palpitation without heart-disease, and 

 the frequent hacking cough without signs of lung 

 or throat mischief, indicate probable irritation of 

 the cardiac and respiratory branches. 



As to the disturbance of sensory nerves, it was 

 difficult to obtain evidence, as the patients were 

 often unable to describe their sensations with 

 accuracy. In five cases, varying from nine to 

 fourteen years of age, distinct dyssesthesia of vision 

 accompanied the attacks of headache, the patient 

 seeing colours, sparks, or other illusions during the 

 attack of headache ; in all but one case, the mother 

 also suffered such spectra with headache. 



Tooth-grinding is produced by the action of the 

 deeply situated pterygoid muscles ; champing of the 



