1326 



A MANUAL OF ANATOMY 



Ascending Tracts.— The tract of GoU is situated close to the 

 posterior median sulcus, and superiorly it is known as the funiculus 

 gracilis. Its fibres are derived from the dorsal roots of the coccy- 

 geal, sacral, lumbar, and lower thoracic nerves. They are at first 

 contained in the tract of Burdach, but, as they ascend, they are 

 gradually displaced inwards, and so form a special tract. The 

 fibres terminate superiorly in connection with the cells of the nucleus 

 gracilis of the medulla oblongata. 



aa. 



Fig. 556. — The Tracts of the Spinal Cord (L. Testut's 



HUMAINE'). 



Anatomie 



a. Anterior Median Fissure 

 i. Posterior Median Fissure 



1. Direct Pyramidal Tract 



2. Crossed Pyramidal Tract 



3. Anterior Ground Bundle 

 3'. Lateral Ground Bundle 



10. Tract of Lissauer 



4. Direct Cerebellar Tract 



5. Tract of Gowers 



6, 6'. Lateral Limiting; Zone 



7. Tract of Burdach 



8. Tract of Goll 



9. Ventral Tract of Posterior Column 



The tract ol Burdach (known superiorly as the funiculus cuneatus) 

 is situated on the outer side of the tract of Goll, next to the dorss 

 horn of grey matter. 



Above the mid-thoracic region it is separated from Goll's tract 

 by the dorsal intermediate or paramedian furrow and a septum o\ 

 pia mater. Its fibres are derived from the dorsal nerve-rootsj 

 Above the mid-thoracic region they are derived from the dorsa 

 roots of the upper thoracic and cervical spinal nerves, and these 

 fibres terminate superiorly in connection with the cells of the 

 nucleus cuneaius of the medulla oblongata. Below the mid-thoracic 

 region the fibres are derived from the lower dorsal nerve-roots, ant 



