274 



STUDIES IN PHYSIOLOGY 



Parts of the Brain. The human brain, like that of the 

 frog, may be divided into three regions, the forebrain, 

 the midbrain, and the hindbrain. The hindbrain reaches 



FIG. 127. Side View of Brain and Upper Part of Spinal Cord. 



B = bodies of vertebrae. 



C= convolutions of the right cerebral hemisphere. 

 Cb = cerebellum. 

 M.Ob = medulla oblongata. 



N spinal cord with s^pinal nerves. 

 Sp = spinous process of vertebrae. 



downward through the large opening (fo-ra'men magnum) at 

 the base of the skull and becomes continuous with the 

 spinal cord. Since the two portions of the central nervous 



