6o6 



THE NERVOUS SYSTEM 



cells and granular matter. A further description of the anatomy of these 

 parts is given later, page 643. 



Fibers of the olfactory nerve proper are found below this layer, and pass 

 through the cribriform plate to be distributed to the olfactory mucous mem- 

 brane. They arise from cells in the olfactory mucous membrane, and end in 

 the glomeruli. The peduncle of the nerve or the olfactory tract, as it is some- 



FIG. 406. Scheme of the Central Connections of the Optic Fibers. (Cunningham.) 



times called, is made up of longitudinal fibers originating in the bulb, with 

 neuroglia and some nerve cells. 



The fibers of the olfactory tract have been traced into the nucleus amyg- 

 dalae and its juncture with the hippocampal gyrus in the temporal lobe, 

 figure 392. The hippocampus must be in some way connected with smell, 

 since a lesion of it, leaving the olfactory tract uninjured, seriously interferes 

 with that sense. 



Taste Center of the Cortex. It is very uncertain where the taste center 

 is situated, if such exist. It has been placed in the anterior portion of the 

 inferior temporal convolution, not far from that of smell, figure 405. 



Auditory Center in the Cortex. This center has been localized in 



