ORIGINAL ARTICLES 9 



marked tract, wedge-shaped, in section lying near the middle line 

 in the columns of Goll throughout the cervical region. Above, 

 these fibres originate probably from the thalamus, but in any 

 case as high as the upper (cerebral) end of the mid-brain, whence 

 they can be traced through the brain-stem down into the pos- 

 terior columns of the cervical region. Below this the fibres 

 become fewer, smaller, and more scattered, and some of them can 

 be traced into the dorsal region, becoming continuous with the 

 superficial bundle described by Hoche, and even occasionally into 

 the oval field described by Flechsig in the lumbar region, and 

 into the triangular bundle described more particularly by Gom- 

 bault and Philippe in the sacral region. 



This tract consists of short, intermediate, and long fibres ; 

 but in each area described above there are other scattered fibres 

 which degenerate upwards. 



Though the above mentioned fibres undergo secondary 

 degeneration downwards, there is merely at present a strong 

 presumption that they convey nerve impulses downwards, but as 

 yet no proof of this. 



REFERENCES. 



1. C. Bastian. Med. Chir. Trans., 1867, p. 499. 



2. Flechsig. " System-Erkrankungen," 1877. 



3. Kahler and Pick. Archiv.f. Psych., 1880, p. 179. 



4. Striimpell. Archiv. f. Psych., 1880, p. 676. 



5. Westphal. Ibid., 1880, p. 788. 



6. Schiiltze. Ibid., 1883, p. 359. 



7. Howard Tooth. Brit. Med. Journ., 1889, i. p. 827. 



8. Schmaus. Virch. Archiv., 1890, p. 326. 



9. Pfeiffer. Deutsche Zeitschr. f. Nervenheilk., 1891, ii. p. 345. 



10. Barbacci. Lo Sperimentale, 1891, ii. p. 386. 



11. Bruns. Arch.f. Psych., 1893, p. 759. 



12. Gombault and Philippe. Arch, de Med. Experiment., 1894, p. 377. 



13. Bruce and Muir. Brain, 1896, p. 333. 



14. Bruce. Brain, 1897, p. 265. 



15. Obersteiner. "Nervose Centralorgane," 3rd edit., 1896, p. 264. 



16. Bischoff. Wien. Uin. Wochenschr., 1896, No. 37. 



17. Flatau. Zeitschr. f. Uin. Medicin, 1897, p. 55. 



18. Zappert. Neurol. Centralblatt, 1898, p. 102. 



19. Quesnel. Ibid., 1898, p. 482. 



20. Dejerine and Sottas. Soc. de Biolog., 1895. 

 Dejerine and Thomas. Ibid., 1896. 



21. Dejerine and Thdohari. Journ. de Physiol. et Path., March 1899. 



