SECTION XIII 



BRAIN, SPINAL CORD, NERVES OF TRUNK, AND 

 SYMPATHETIC SYSTEM 



THERE are two nervous systems described in the body the 

 cerebro-spinal and sympathetic. The cerebro -spinal can be 

 divided into central and peripheral parts, the central part con- 



Cerebral Hemisphere 



/// Pons Varolii 



Medulla Oblongata 



FIG. 60. THE BRAIN (SIDE VIEW). 



sisting of the brain and spinal cord, which send branches to 



the periphery. The sympathetic system consists of two chains 



of ganglia which communicate with the peripheral part of the 



cerebro-spinal system by means of efferent and afferent branches. 



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