LECTURE XII. 



MARCH 31, 1858. 

 THE NERVOUS SYSTEM. 



Peripheral terminations of the nerves Nerves of special sense The skin and the 

 distinction of vessel-, nerve-, and cell-territories in it Olfactory mucous mem- 

 brane Retina Division of nerve-fibres The electrical organ of fishes Mus- 

 cles Further consideration of nerve-territories Norvous plexuses with gan- 

 glioniform enlargements Intestines Errors of the neuro-pathologists. 



The great nervous centres Grey substance Ganglion- [nerve-] cells containing 

 pigment Varieties of ganglion-cells ; sympathetic cells in the spinal marrow 

 and brain, motor and sensitive cells. Multipolar (polyclonous) ganglion-cells 

 Different nature of the processes of ganglion-cells. 



I RETURN, gentlemen, to-day once more to the skin. 

 The difference which exists between the individual pa- 

 pillae of the skin seems to me so important theoretically, 

 that I think I must claim your special attention to it. In 

 the greater number of the papillae we see, as I mentioned 

 to you the last time, a single or, when the papilla is very 

 large, a branched, vascular loop. The majority of these 

 vascular papillae have no nerves ; others again which 

 contain tactile bodies, no vessels. If we imagine the 

 vessels and tactile bodies removed, there remains only a 

 very small quantity of substance in the papilla, but within 

 it there still are morphological elements, and it is easy 

 to convince oneself that connective tissue with its corpus- 

 cles (which latter after injection are very easily distin- 



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