2I 4 



Life and Health 



Disease or injury of the cerebellum usually produces 

 blindness, dizziness, a staggering gait like that of a drunken 

 man, and a feeling of insecurity in maintaining right posi- 

 tions during the execution of movements. There is no loss 

 of consciousness or other disturbance of the mental functions. 



FIG. 117. A Vertical Section of the Brain. 



A, frontal lobe of the cerebrum; , parietal lobe; C, parieto-occipital lobe 

 with fissure between this lobe and D, the occipital lobe; E, cerebellum; 

 F, arbor vitae ; //, pons Varplii ; K, medulla oblongata ; L, portion of lobe 

 on the opposite side of brain. The white curved band above H represents 

 the corpus callosum. 



Experiment 93. Examine the least bit of the 'white matter of the 

 brain under a microscope of high power. The fibers are the ordinary 

 white fibers. Now examine the gray matter and note the elongated 

 cells with their long, fine branches. 



328. The Membranes of the Brain. The brain and spinal 

 cord are protected by three important membranes^ known as 

 the meninges, the dura mater, the arachnoid, and the pia mater. 



