THE NERVOUS SYSTEM 



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c^r^^ 



^ 



?t 



I t 4-.... 



IT2 



I I I 







Fig. 1 13. — Diagram Showing the Relation of Some of the Cells and Fibers 

 OF the Spinal Cord. Lateral aspect of the cord. 

 a. Ventral median fissure; ac, cells of the ventral horn; ayi, ventral root of 

 spinal nerve; c, axone; co, collateral fibers; e, fibers connecting higher brain 

 centers with cerebellum;^, sensory fibers of fillet to the brain; g, gn, go, ganglion 

 of dorsal root; gr, gray matter; ir, fibers of the dorsal sensory tract; I, fibers to 

 cerebellum; m, cell in the ventral horn or column of gray matter; n, spinal nerves; 

 o, cells in the dorsal horn or column of gray matter; nc, nucleus gracilis and 

 nucleus cuneatus; nr, nucleus ruber; r, a fiber of posterior root; rb, ganglion 

 cells of medulla; s, tract of fillet to the brain; sp, fibers of superior peduncle of 

 the cerebellum; /', fiber of crossed pyramidal tract; ts, point of decussation; v, 

 division of fiber x into its cranial and caudal extensions; w, a collateral of the 

 longitudinal fiber ir. 



