THE MEDULLA OBLONGATA AND TEGMENTUM OF THE PONS. 211 



111 the section which I last showed you the anterior 

 peduncles had begun to separate themselves from the mass of 

 the cerebellum. They now leave it altogether and are found 

 externally on each side of the tegmentum. The layer of the 

 fillet is a broad structure which here in the pons separates the 



s 



fcffiz&ta 



I&/4V& wx^iK&SPtte 



f,.M-.' > &. ^'- W-:':'' 



f?L:., M'Mf ^ 



r^3^ 



/ A/v^ ?^^^^^fe^^^ ' 



' IK -^ 



^/-a//5'; (, r 



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FIG. 127. 



Section at the point where the ascending root of the trigeminus bends outward. Roots 



of trigeminus. 



Centr. H. B., Central tegmental tract. Cenlr. V. Balm, Central tract of fifth nerve. 



Dir. ,S';.s-. ('erfliellarbahn. Direct sensory cerebellar tract. 



fibres of the tegmentum from those of the crusta, just as it did 

 in sections made farther forward through the crura cerebri. 



We can distinguish in the fillet an outer lateral portion 

 and a more median one. The former is already beginning to 

 trend upward to the quadrigeminal region, and the latter will 

 follow its example a little farther forward. Just at the point 



