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THE NERVOUS SYSTEM 



Fig. 234. Diagrams showing the location of the most important tracts of the brain stem 

 based on figures by Dejerine. Solid red, aberrant bundles of the corticobulbar tract; red stipple, 

 corticospinal tract; solid blue, secondary afferent paths of the trigeminal nerve; horizontal blue 

 lines, the medial lemniscus (proprioceptive) ; blue stipple, ventral spinothalamic tract (or tactile 

 path); blue circles, spinal root of the trigeminal nerve; solid black, lateral spinothalamic tract 

 (pain and temperature); black triangles, ventral spinocerebellar tract; black circles, dorsal spino- 

 cerebellar tract; black stipple, rubrospinal tract. A, Through the mesencephalon at the level of 

 the inferior colliculus; B, through the rostral part of the pons; C, through the medulla at the level 

 of the olive. 



