THE SPINAL CORD 241 



fibers decussate in the anterior pyramids of the medulla 

 oblongata. 



II. (a) The direct cerebellar tract occupies the outer posterior 

 part of the lateral column. Its fibers reach the cerebellum 

 through the inferior peduncles, after having traversed the poste- 

 rior pyramids of the medulla. This tract exists throughout the 

 length of the coid. (V) The column of Goll (postero-internal 

 column) is situated posteriorly in a position corresponding to 



a 



FIG. 75. Scheme of the conducting paths in the spinal cord at the 3d dorsal 



nerve. 



The black part is the gray matter. V, anterior, hw, posterior root; a, direct, and g, 

 crossed, pyramidal tracts; b, anterior fundamental fasciculus; c, Goll's column; d, 

 column of Burdach; e, anterior radicular zone; f, mixed lateral tract; h, direct cere- 

 bellar tracts. (Landois, modified.) 



the column of Turck anteriorly just lateral to the posterior 

 median fissure. Fibers in this column extend from the upper 

 lumbar region to the funiculi graciles of the medulla. 



III. (a) The anterior fundamental fasciculus lies between the 

 column of Turck internally and the anterior cornu and anterior 

 roots of the spinal nerves externally. Its fibers are lost in the 

 medulla above, (b) The anterior radicular zone is external to 

 the anterior roots of the spinal nerves and anterior to the crossed 

 pyramidal tract and the direct cerebellar fasciculus. Its fibers 

 are lost in the medulla above, (c) The mixed lateral column is 

 16 



