THE MAMMALIAN NERVOUS SYSTEM 



89 



C. SUMMARY OP CEREBELLAR CONNECTIONS 



1. Afferent. 



1) Tractus spino-cerebellaris dorsalis. 



2) Tractus spino-cerebellaris ventralis. 



3) Tractus vestibulo-cerebellaris. 



4) External and internal arcuate fibers. 



5) Central tegmental bundle to inferior olive. 



6) Spino-olivary tract to inferior olive. 



7) Tractus olivo-cerebellaris. 



8) Tractus olivo-spinalis. 



9) Cortico-pontile tracts to pons. 



10) Pons to cerebellum by brachium pontis. 



11) Tecto-cerebellar tract through velum medullare anterius. 



2. Efferent. 



1) Brachium conjunctivum to nucleus ruber. 



2) Tractus rubro-thalamicus to thalamus and cerebral cortex. 



3) Tractus rubro-spinalis to cord. 



4) Tractus cerebello-tegmentalis to reticular formation of brain stem 



by all three cerebellar peduncles. 



TABLE OF CONDUCTION PATHWAYS 



Name. 



A I 1 1) 

 A I 1 2) 

 A I 1 3) 

 A I 2 1) 



Cells of 

 origin. 



spinal 

 ganglion 



dorsal 



gray 



column 



lateral 

 nucleus of 

 thalamus 



Location 

 and course. 



peripheral 

 nerves and 



dorsal 



roots 



ventral 

 funiculus 



of cord 



internal 

 capsule 



Decussation. 



ventral 

 commis- 

 sure of 

 cord 



Termination. 



dorsal 



gray 



column 



lateral 

 nucleus of 

 thalamus 



postcentral 

 gyrus 



(Table continued) 



Function. 



touch and 

 pressure 



touch and 

 pressure 



touch and 

 pressure 



notebooks. So far as possible indicate the source of the stimulus 

 for each fiber system (sense organ, motor areas of cerebral 

 cortex, or associational nucleus, etc., as the case may be), the 

 complete course of the path, the number of neurones involved 

 in the path and their limits, collateral reflex connections, and the 

 organ at which the path terminates. 



A useful exercise is to imagine a localized injury which de- 

 stroys a particular center or tract or group of tracts at some 

 point, and then to determine what symptoms would result from 

 the injury in question. 



