CHAPTER VII. 



DISEASES OF THE BBAIN, RESPIBATOST OBGANS AND 



AIB PASSAGES. 



STAGGEES AND APOPLEXY. 



A want of balance in the circulation of the blood, 

 an unnatural quantity going to the brain, so overcomes 

 its energies that the diseases mentioned at the head of 

 this chapter follow. They differ only in degree, and may 

 arise from different conditions. Where the animal is vig- 

 orous, well fed, and full of fluids, active congestion will 

 be present, but when poorly fed, and reduced in flesh; a 

 loss of energy of the brain may be followed by passive 

 congestion. 



Violent exercise, such as heavy loads and hard drives, 

 tight collars, too tight curb reins, any cause that forces 

 too much blood to the head or prevents its return by the 

 viens, may be causes of this disease, also after long fasting; 

 too much food unnaturally distending the stomach, sym- 

 pathetically affecting the brain, will produce it. 



STAGGERS. 



Megrims is the mildest of these affections. 



Symptoms. — When the horse is drawn quickly, he will 

 stop suddenly, shake the head and show symptoms of 



