Chap. XIX] 



SUMMARY 



403 



Nerve- 

 endings 



Nerve- 

 impulse 



1. End arborizations 



2. 



3. 



Inter-epithelial arborizations ( 

 Organules 



terminations in brain or cord. 



terminations of sensory 

 fibres at the periphery 

 J of the body. 

 Motor plates — terminations of motor nerve-fibres in 



voluntary muscle. 

 Plexus — terminations of motor nerve-fibres in involun- 

 tary muscle. 

 J Nature not positively known. 

 I Presumably a physical molecular vibration. 



Classifi- 

 cation of 

 Nerve- 

 fibres 



Efferent 



Excitatory 



, Inhibitory 



' Excitatory 



Afferent 



. Inhibitory 



Reflex 



Inhibito- 

 I'eflex 



f Motor 



, Secretory 



Inhibito- 

 motor 



Inhibito- 

 secre- 

 tory 



Sensory 



Motor. 



Vasomotor. 



Cardiomotor. 



Visceromotor. 



Pilomotor. 

 ' Salivary. 



Gastric. 



Pancreatic. 



Sweat. 

 ( Subdivisions correspond- 

 S ing to the varieties of 

 i motor fibres above. 



Subdivisions correspond- 

 ing to the varieties of 

 secretory fibres above. 



Visual. 



Auditory. 



Olfactory. 



Gustatory. 



Pressure. 



Temperature. 



Pain. 



Hunger. 



Thirst, etc. 

 J According to the efferent 

 \ fibres affected. 



Inhibitory effects upon the 

 conscious sensations are 

 not demonstrated. 



The reflex fibres that cause 

 unconscious reflexes are 

 known to be inhibited 

 in some cases at least. 



