THE SPINAL NERVES 



57 



the central nervous system that the incoming impulses find their way into the 

 proper outgoing paths. To bring about this shunting of incoming impulses 

 into the appropriate efferent paths requires the presence of untold numbers 



Ciliary ganglion Maxillary nerve 

 Sphenopalaline ganglion , 

 Superior cervical ganglion of sympathetic \ \ 



Cervical 

 plexus 



Brachial f 

 plexus | 



Greater 

 splanchnic nerve 



Lesser 

 splanchnic nerve 



Sacral 

 plexus 



Pharyngeal plexus 



Middle cervical ganglion of sympathetic 

 Inferior cervical gang, of sympathetic 

 Recurrent nerve 

 Bronchial plexus 



Cardiac plexus 



Esophageal plexus 

 Coronary plexus 



Left vagus nerve 



Gastric plexus 

 Celiac plexus 



Superior mesenteric plexus 



Aortic plexus 



Inferior mesenteric plexus 



Hypogastric plexus 



Pelvic plexus 



Bladder 

 Vesical plexus 



Fig. 33. Fig- 34- 



Fig. 33. General view of the central nervous system, showing the brain and spinal cord in situ. 



(Bourgery, Schwalbe, van Gehuchten.) 



Fig. 34. Diagram of the sympathetic nervous system and its connections with the cerebrospmal 



nerves. (Schwalbe, Herrick.) 



of central or association neurons, and it is of these that the central organs- 

 brain and spinal cord are chiefly composed. 



Many authors employ a classification which emphasizes the distinction be- 



