388 



PHYSIOLOGY 



V*sfibulo Spinal 



Crossed Pyraonidal Tract 



-Denote Nucleus 



Inj-trior Olive 



Direct Pyranmla! Tr^ct 



D65C6MDING hdRVE 

 TRACTS. 



Fio. 199. St-lu'iiiJi <>f .ouisc taken by chief descending tracts of brain stem. (GORDON 

 HOLMES.) The tnu-t in rod. to tho right of the rubro-spinal tract, includes the posterior 

 longitudinal bundle, together with the fibres of the thalamo-spinal and tecto-spinal 

 tracts. 



