756 



NEUROLOGY 



most part to the posterior column, are found also in the substantia gelatinosa of 

 Rolando; their axons are short and entirely confined to the gray substance, in which 





- Dorsal spinocerebellar 

 fasciculus 



'spinocerebellar 

 fasciculus 



Posterior 



spinothalamie 



fasciculus 



Spinotectal 



fasciculus 



Ventral 



spinothalamie 



fasciculus 



Fio. 669. Diagram showing a few of the connections of afferent (sensory) fibers of the posterior root with the efferent 

 fibers from the ventral column and with the various long ascending fasciculi. 



they break up into numerous fine filaments. Most of the nerve cells are arranged in 

 longitudinal columns, and appear as groups on transverse section (Figs. 669, 670, 671). 



Lateral cerebro spinal 

 fasciculus 



--Rubrospinal fasciculus 

 Tectospinal fasciculus 



/ Vestibulospinal fasciculus 



FIG. 670. Diagram showing possible connection of long descending fibers from higher centers with the motor 

 cells of the ventral column through association fibers. 



Nerve Cells in the Anterior Column. The nerve cells in the anterior column are 

 arranged in columns of varying length. The longest occupies the medial part of 

 the anterior column, and is named the antero-medial column: it is well marked in 

 C 4, Co, again from C 8 to L 4, it disappears in L 5 and S 1 but is well marked in 



