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PRINCIPLES OF VETERINARY SCIENCE 



The cerebrum, or large brain, occupies the anterior part of the 

 cranial cavity. It is somewhat egg-shaped in the horse, and is 

 divided by a deep median fissure into two hemispheres. Ex- 



Transverse fissure 



Longitudinal 

 fissure 



Olfactory bulb 



Frontal pole of hemisphere 



Cerebrum 



Occipital pole of 

 hemisphere 



Cerebellum 



Medulla oblongata 



Fig. 53. — Dorsal view of brain of horse. (Sisson, Anatomy of Domestic 



Animals.) 



ternally, the surface is thrown up into well-defined convolutions. 

 The outer part is composed of gray matter. In the center is 

 found a core of white matter. An irregular cavity, termed 

 the lateral ventricle, may be seen in the interior of each hemi- 



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