628 THE NERVOUS SYSTEM 



Afferent or sensory fibers of the ordinary spinal-root ganglion cells are 

 present in the sympathetic nerves of the splanchnic region, being distributed 

 merely to the visceral region. True afferent sympathetic fibers have been 

 demonstrated. These arise from cells located in the sympathetic ganglia, 

 and pass through the rami communicantes, to end by terminal arborizations 

 in the spinal ganglia, chiefly around cells of the Dogiel type. The number 

 and significance of these afferent neurones remain as yet uncertain. 



