THE SYMPATHETIC SYSTEM 275 



and pathologically interdependent and influence each 

 other. As regards the animal system, the higher vegeta- 

 tive centres do not necessarily enter in the various pro- 

 cesses, and I will even say, that as far as the vegetative 

 system is concerned, the intervention of these centres is 

 uncommon. These centres are not indispensable, but 

 pathologically they may become prominent and the inter- 

 vention of the psychic or psycho motor centres play an 

 important part in disturbances of the vegetative life. 



THE SPINAL CENTRES OF THE VEGETATIVE SYSTEM. 



These centres are located in the spinal cord and can be 

 divided into two groups. 



1. Motor centres. 2. Sensory centres. 



MOTOR CENTRES. 



These centres are located in the lateral posterior portion 

 of the anterior horn of the cord, or its equivalent. Let us 

 add, that in certain regions of the axis exist other vegeta- 

 tive cell groups, located on the median ventral part of the 

 anterior horn, in the neighborhood of the commissure; it is, 

 therefore, these two groups of cells that we are going 

 to investigate. 



A. CELLULAR GROUPING OF THE CEREBRAL TRUNK. 



These groups are in the cerebral peduncle and in 

 the bulb. 



In the cerebral peduncle, the vegetative nucleus formed 

 by the anterior and dorsal nuclei of the oculo motor 

 (III cranial), which is located on the floor of the aqueduct 

 of Sylvius. It is the pupillary nucleus. 



In the bulb are found 5 vegetative nuclei; they are: 



(a) Juxta-pretuberantial nucleus, located in the median 

 side of the nucleus of the facial nerve. It is the lacrymal 

 nucleus, which I prefer to call lacrymal mucous facial nucleus. 



