546 



THE NERVOUS SYSTEM 



The Fasciculi or Tracts in the White Matter of the Spinal Cord. 



We have already shown that the white matter of the cord is divided on each 

 side into the anterior, lateral, and posterior funiculi. But evidence of various 

 kinds discussed below has shown the following main conducting channels or 

 tracts through the cord, see figures 363 and 364 for illustration. 



Radix anterior 

 Fasciculus ccrcbrospinalis lateralis [pyramidalis lateralis] . 



Anterior root fibre 



Bundle to anterior funiculus from the formatio reticulari! 



Fasciculus cerebrospinalis anterior 



[pyramidalis anterior] 



Bundle to anterior funiculus .- 

 from the formatio reticularis \ 



Substantia grisea. 



Fasciculus 



anterolateralis super- 



ficialis [Gowersij and 



(ascending) bundle from 



anterior funiculus to the 



formatio reticularis 



Substantia alba 



Bundle to lateral 

 funiculus from Deiters' 

 nucleus and from the 

 red nucleus . 



Fasciculus cerebro 



spinalis lateral!" 



[pyramidalis lateral! 



Nervus spinalis 



Ganglion spinale 

 Cells of tho spinal ganglion 

 ,. Fasciculus cerebellospinalis 

 f . Secondary reflex path 



, Radix posterior 



Collateral 



to the posterior horn 

 Secondary path of 

 posterior funiculus 

 Descending posterior 



root fibre 

 Primary reflex path 



Ascending posterior 

 root fibre 



>- Secondary reflex path 



.Descending posterior 

 root fibre 



Posterior root fibre 



Sulcus medianus 

 posterior 



- Posterior root fibre 



FIG. 363. Reconstruction of a Segment of the Spinal Cord Representing Both a Tran s- 

 verse and Longitudinal Section. (Held, from Spalteholz's Anatomy.) 



Tracts of the Cord. 



Funiculus posterior. 



Fasciculus gracilis, tract of Goll (ascending). 



Fasciculus cuneatus, tract of Burdach (ascending). 



Comma, tract of Schultz (descending). 

 Funiculus lateralis. 



Fasciculus cerebello- spinalis, direct cerebellar (ascending). 



Fasciculus antero-lateralis super ficialis, tract of Gowers (ascending). 



Fasciculus cerebro- spinalis lateralis, crossed pyramidal tract 

 (descending). 



