12 T 



FIG. 408. DIAGRAMMATIC REPRESENTATION OF THE TRACTS OF THE SPINAL CORD AND 



THEIR RELATION TO THE PATHS OF THE MEDULLA OBLONGATA. 



(7, cervical, Z, lumbar, and 7*, thoracic segments of the spinal cord ; the prefixed 

 number indicates more exactly the level ; LM, lower, and UM, upper segments of the 

 medulla ; io, inferior olivary body ; in the lower medulla the lateral nuclei are shown 

 just behind the olive ; in the upper medulla the accessory olivary nuclei are shown. 



Column of Goll. 



Column of Burdach. 



Anterior ground bundle, continu- 

 ous in the medulla with the pos- 

 terior longitudinal bundle. 



Pyramidal (motor) tracts. 



Spinal root of the. trigeminus (seen 

 only in LM and UM). 



530 



F "1 Lateral ground bundles, and tract 



H-' * of Gowers. 



Direct cerebellar tract. 



Spinal root of the auditory nerve, 

 and the cerebello-olivary fibres. 



Mesial fillet, interolivary portion. 

 Grey matter. 



