CONTENTS. IX 



CHAPTER XII. 



PAGE 



The Visceral Efferent Division 199 



Origin, arrangement and distribution of the components; 

 fibers to the sympathetic ; nerves of mastication; of expres- 

 sion; vagus and spinal accessory complex; relations of the 

 visceral efferent column. 



CHAPTER XIII. 



The Sympathetic System 206 



Development of ganglia and nerves; structure of the system; 

 general constitution and relations. 



CHAPTER XIV. 



Centers of Correlation 218 



General constitution of central system; four chief zones; sub- 

 stantia reticularis; functions and organization of; centers of 

 correlation; their relation to complex activities; materials 

 for study of these centers. Region of the myelencephalon. 



CHAPTER XV. 



The Cerebellum 226 



Phylogenetic history. 



Mammalian cerebellum; hemispheres and vermis; subdivisions 



and fissures; structure; review of vertebrate cerebellum. 



Structure of cerebellar cortex; fiber tracts of cortex. Deep 



gray masses and their fiber connections. 

 Evolution of structure and function, general survey; function 



in mammals. 



CHAPTER XVI. 



Centers of Correlation. The Mesencephalon and Dien- 

 cephalon 253 



1. The Cutaneous Apparatus. 



The lemniscus system; the diiJerentiation of centers in 

 the tectum mesencephali. 



2. The Optic Apparatus. 



Tectum opticum; development of optic centers in the 

 thalamus; division of function between centers. 



3. Centers related to the posterior commissure. 



