;i2. PRINCIPLES OF GENERAL. PHYSIOLOGY 



Fits. -25'2. 



ELLIOTT'S DIA:KAM OK THE EFFERENT NERVES FROM THK 

 CENTRAL NERVOUS SYSTEM IN THE MAMMAL. 



.4, The non-ganglionated ordinary motor nerves to striped muscle, which are distributed 

 si-^nifiitally only. On the left side these are omitted for sini)>licity, and only the auto- 

 noinic or gaiiglionated visceral nerves to plain muscle are indicated. 



Of these, B is the cranio-cervical outflow in the vagus, etc. ; C, the thoracico-lumbar or 

 sympathetic proper ; O, the sacral outflow, or pelvic visceral nerve to the bladder and 

 colon. All these subdivisions contain both excitatory and inhibitory nerves. 



C, is the sympathetic ganglion cell ; C, the paraganglion cell, secreting adrenaline, the chief 

 mass of these being concentrated to form the medulla of the adrenal gland, though a 

 few, even in adult life, may be found elsewhere in relation to the various sympatheti c 

 ganglia. The black rectangle innervated by the nerves from the cells C, represents the 

 mass of plain muscle which is also stimulated by adrenaline, that is, by the secretion 

 of C.. 



Afferent sensory nerves and their posterior root ganglia are all omitted from the diagram. 

 Their course from the viscera is not clearly known. 



* (Elliott, 1913, 1, p. 313. "From Brain.") 



