ORIGIN OF CEREBRAL NERVES. 325 



sides, but chiefly with that of the opposite hemisphere. The con- 

 nection is established first and principally by the pyramidal tracts, 

 some of the fibers running directly from the tract to the nucleus, 

 and others, leaving the tract high up, run through the accessory 

 fillet (Bechterewi) to a point near the respective nuclei which they 

 are about to enter; and, second, the fronto-pontal, temporo- 

 pontal and intermediate tracts are believed to send some fibers to 

 the genetic nuclei of the same side. The reflex connection of these 

 genetic nuclei is established for all of them by the medial long- 

 itudinal bundle; by the anterior longitudinal bundle and by the 

 olivary pedicle (for the third, fourth, and sixth), by the trape- 

 zoid body (for the seventh) and by the spinal tract of the tri- 

 geminal nerve (for the fifth, seventh, and twelfth). 



