LONGITUDINAL FIBERS OF PONS. 



275 



junctivum, and, through the superior medullary velum, enters 

 the superior worm of the cerebellum. It thus belongs to the in- 

 direct sensory path (through the cerebellum). From the cerebellar 

 cortex the path is continued by the axones of Purkinje's cells to 

 the nucleus dentatus, whence the brachium conjunctivum com- 

 pletes it up to the opposite red nucleus and thalamus. The an- 

 terior ascending cerebello-spinal and the spino-thalamic tracts 



Fig. 87. Superior section of the pons. (Original.) 



a. Beginning of decussation of brachium conjunctivum. b. Formatip reticularis. c- 

 Brachium conjunctivum. d. Medial longitudinal bundle, e. Fourth ventricle, f. Superior 

 medullary velum, g. Descencding root of sth n. h. Spino-thalamic tract, i. Lateral 

 fillet, j. Medial fillet, k. Long, fibers from basis pedunculi. 1. Superficial transverse fibers. 

 m. Nucleus pontis. n. Deep transverse fibers of pars basilaris pontis. 



are the chief bundles- of a spino-encephalic system of fibers which 

 terminates very largely in the cerebellum and thalamus, but also 

 sends fibers to the nucleus lateralis inferior and other reticular 

 nuclei, to the substantia nigra, to the inferior and superior collic- 

 uli of the corpora quadrigemina, to the nucleus ruber, the nu- 

 cleus hypothalamicus, and the corpus striatum. In this spino- 

 encephalic system there are two important paths the direct 



