174 



INTRODUCTION TO NEUROLOGY 



spinal V Tract 

 reficular formation 



spinal Y Tract- 

 spinolfnudeus 



-e. Touch and pressure 

 - 7. pain and tempraTure 

 - p} spinal lemniscus 



Fig. 81. Diagram of the exteroceptive conduction pathways contained 

 within the spinal cord and brain stem. The figure illustrates cross-sections 

 of the central nervous system in the lower cervical region of the spinal 

 cord, at the level where the cord passes over into the medulla oblongata, at 

 the level of the roots of the VIII cranial nerve, through the inferior collicu- 

 lus and through the thalamus. 



1. Connections of peripheral neuron of touch, temperature, or pain for 

 intrinsic spinal reflexes. 



