34 RECENT LITERATURE. 



According to L. Auerbach destruction in the cat of a considerable length of the posterior 

 part of one half the spinal cord, including the posterior white column, the posterior horn of 

 grey matter, and the posterior part of the lateral column, is followed by degenerations (ascend- 

 ing) in the dorsal cerebellar tract and antero-lateral remainder of the opposite side, with degene- 

 rated fibres in the anterior commissure (besides the well-known ascending degenerations of the 

 same side). The number of degenerated fibres diminishes gradually as they are traced upwards. 

 In the medulla oblongata they are few in number and mostly on the side opposite the lesion, 

 dorsal to the olivary nucleus ; a very few on the same side dorsal to the nucleus lateralis. 

 The degeneration following a lesion in the lumbar cord is in the ventro-lateral (antero-lateral) 

 tract, and is traceable up to the ventral part of the superior worm of the cerebellum ; thedorso- 

 lateral cerebellar tract ends more dorsally. also in the superior worm. Some degenerated fibres 

 pass through the corpus dentatum cerebelli into the dorsal part of the superior peduncle. 



b. Destruction of tlie grey matter of tlie spinal cord. This lesion can be experimentally 

 produced in the rabbit by compression of the aorta, lasting for about an hour (Ehrlich and 

 Brieger). The immediate result of the experiment is to cause necrosis of all the nerve-cells 

 in the lumbar region of the spinal cord, without immediately affecting the white matter or 

 the nerve-roots, a condition which is followed in the course of a few days by degeneration of 

 certain fibres, which may be assumed to be those which emanate from the necrosed cells. 

 If the animal is kept until this degeneration is well marked and is then killed and the 

 cord examined in sections, it is found that in the necrosed region and immediately above 

 it there is extensive degeneration in all the white columns of the cord, but least in the pos- 

 terior columns and in the posterior parts of the lateral columns, where the long tracts of con- 

 nection with the brain are situated. In sections taken higher up and well above the region 

 of necrosis this diffuse degeneration has disappeared, but there is well-marked degeneration 

 along the whole length of the cord in the tract of Goll and in the antero-lateral ascending 

 tract. It has been inferred, therefore, by Singer and Munzer that these tracts contain long 

 fibres which are derived from the cells of the grey matter (of the lumbar region). 



c. Destruction of the cells of Clarke's column along a certain length of the cord is followed 

 by well-marked " ascending " degeneration in the dorso-lateral (direct) cerebellar tract (Mott). 



RECENT LITERATURE. 



Auerbach, 3j. , Zur Anatomic d. aufsteigenden degenerierenden Systeme des Ruckemnarks, Anat. 

 Anzeiger, 1890. 



Bastian, H. Charlton, On the symptomatology of total transverse lesions of the spinal cord, 

 Medico-Chirurgical Transactions, vol. 73, 1890. 



Bechterew, "W., Ue. d. Bestandtheile der Hinterstrdnge des Riickenmarks, Neurol. Centralbl., 

 1885 ; Ueber einen besonderen Bcstandtheil der Seitenstrange des Riickenmarks und iiber den Faser- 

 ursprung der grossen avfsteigenden Triyeminusuurzel, Arch. f. Anat. u. Physiol., Anat. Abth. 1886 ; 

 Ueber die hinteren Nervenwurzeln, Hire Endigung in der grauen Substanz des Riickenmarks und ihre 

 centralc Fortsetzung im letzteren, Archiv f. Anat. u. Phys. , Anat. Abth., 1887 ; Le ccrveau de Vhommc 

 dans ses rapports, c., Arch, slaves de biologic, 1887 ; Ueber die Pyramidenbahnen beim Menschen u. 

 d. Tkieren, $c., Neurol. Centralbl.. 1890. 



Bechterew u. Hosenbach, Ueber die Bedeutung der Intervertebralganglien, Neurol. Centralbl.. 

 1884. 



Bertelli, Le sitton intermediaire ante'ricur de la moelle humaine dans la premiere annee de vie, 

 Extract in Arch. ital. de biol. xi., 1889. 



Birge, E. A., Die Zahl der Ncrvenfasern und der motorlschen Ganglienzellcn im Riickenmark 

 des Froschcs, Archiv f. Anat. u. Phys., Phys. Abth., 1882. 



Burckhardt, K. E,., Jfistologische Untersuchungen am Riickenmark der Tritonen, Arch. f. 

 mikrosk. Anat., Bd. xxxiv., 1889. 



Colman, W. S., Notes on the minute structure of the spinal cord of a human fcelus, Journ. of 

 Anat. and Physiol., 1884. 



Corning:, H. K., Ueber die Entwicklung der Substantia gelatinosa Rolandi beim Kaninchen, 

 Arch. f. mikrosk. Anat., xxxi., 1888. 



Dickinson, On the changes in the nervous system which follow amputation, Journal of Anat. and 

 Physiol., 1868. 



Dreschfeld, J., On changes in the spinal cord after amputation of limbs, Journ of Anat. and 

 Physiol., 1880; Riickenmark u. Gehirn i. e. Falle v. angeb. Mangel eines Vordcrarms, Yirch. Arch. 

 89, 1882. 



Eding-er, L., Vorlesungen u. d. Bau der nervoscn Centralorgane, Leipzig, 1889 ; Ue. di-e Fort- 

 setzung der hinteren Ruckenmarkswurzeln zum Gehirn, Anat. Anzeiger, iv., 1889 ; Einiges Tom Verlauf 

 der Gefuhlsbahnen im centralen Ncrvensystemc, Deutsche medicin. Wochenschrift, 1890. 



Ehrlich u. Brieger, Ueber die AusS'-haltunn des Lendenmarks, Zeitschr. f. klin. Medicin. vii. , 

 1884. 



