362 



THE SPINAL CORD, BY J. GERLACH. 



sions, and by being traceable tolerably far forwards, part at 

 least extending to the level of the central canal. The vertical 

 fibres ascend for the most part in the form of a thick fasciculus 

 in front of the substantia gelatinosa (fig. 221, h). This vertical 

 fasciculus is connected with the posterior columns, and partly 

 also with the posterior roots of the nerves, by numerous ho- 

 rizontal or obliquely- backward -running fibres, the greater 

 number of which traverse the substantia gelatinosa. Suc- 

 cessful gold-tinted preparations exhibit also fibres situated 



Fig. 229. Antero-posterior longitudinal section through the lumbar 

 portion of the human spinal cord, treated with chloride of gold and 

 potassium. Magnified 30 diameters, a, Anterior columns ; b, ante- 

 rior roots of the nerves traversing the anterior columns obliquely ; c, 

 anterior cornu ; d, posterior cornu, with the vertical fasciculi ascend- 

 ing in front of the substantia gelatinosa ; e, substantia gelatinosa, 

 traversed by horizontal fasciculi ; /, posterior column ; g, posterior 

 roots of the nerves, divided transversely in consequence of their 

 lateral entrance. 



anteriorly, which are either given off from, or unite with, this 

 vertical fasciculus. Besides these vertical fibres, forming a 

 single fasciculus, others pursuing a similar direction occur in 

 the posterior cornua, which, situated more internally and fur- 



