FASCICULUS CEREBRO-SPINALIS IN THE RAT 507 



confusing neuroglia fibers with non-medullated nerve fibers, 

 it still may be worth while to call attention to this additional 

 evidence of the nervous character of this group of non-medullated 

 fibers, namely, that they degenerate in the cord after destruction 

 of their cells of origin in the cerebral cortex. These experiments 

 also demonstrate that the non-medullated fibers contained in 

 the area occupied by the pyramidal tract in the cord are true 

 pyramidal fibers, since they come from the motor cortex. 



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