346 



THE NERVE SYSTEM 



above and the periphery of the body by thirty-one 

 pairs of nerves. It is lodged in the spinal canal, 

 ensheathed by the membranes, dura mater, arachnoid, 

 and pia mater, and commences above at the atlas 



FIG. 122 



SULCO-MARGINAL TRACT VENTRAL VESTI BU LOSP1 N AL TRACT 

 FROM SUP. QUADRIG. FROM FASTIGIUM (LOWCnthal's) 



FIG. 123 



VENTRAL VtSTIBULOSPINAL TRACT 



