254 ENDOCRINE GLANDS 



to indicate the pathological changes which are directly 

 due to anatomical or physiological facts. My object is to 

 simplify this subject in studying it only from an anatom- 

 ical and a physiological point of view, trying to describe 

 all that is necessary to the understanding of the subject, 

 but no more. 



The plan outlined is as follows : 



1. WHAT DO WE UNDERSTAND BY THE SYMPATHETIC 

 SYSTEM? Evolution of the various conceptions and defi- 

 nition of the parts. 



2. ANATOMICAL UNITY OF THE VEGETATIVE NERVOUS 

 SYSTEM. The neuro-organic cell and the vegetative neu- 

 ron; the motor organic arc and the modes of transmission 

 of the neurons. The sensory vegetative arc. 



3. THE VARIOUS PARTS OF THE SYSTEM. The vege- 

 tative centres, extra axial vegetative pathways; ganglions 

 of the vegetative nervous system. 



4. ANATOMICAL AND PHYSIOLOGICAL DESCRIPTION OF 

 THESE SYSTEMS. The vegetative nervous systems arising 

 from the cerebral trunk; from the spinal column. The 

 local visceral systems. Physiological plans of the various 

 vegetative systems. 



5. PHYSIO-PHARMACOLOGICAL OPPOSITION OF THE 

 Two GREAT VEGETATIVE SYSTEMS. Pharmacological 

 electivity and antagonism. Pharmacology of the nervous 

 system of vegetative life; the endocrine glands and the 

 pharmacology of vegetative life. 



I. WHAT DO WE MEAN BY THE SYMPATHETIC SYSTEM? 



If we look up in a modern dictionary the definition of the 

 sympathetic system we find that under this name have 

 been described a bundle of nerve filaments and ganglions, 

 which correspond fairly closely to the anatomical entity 

 that the old anatomists described under the name of 



