729 
in such a way, that all fibres from the left Drrrers Complex towards 
the posterior bundles and the raphe, had been cut leaving the left 
longitudinal bundle practically intact. Solely in this animal both 
longitudinal fascicles were upward degenerated, on the right side more 
heavily than on the left side. In three animals the lesion struck 
the Derrers nucleus (118, 113 and 99), In these cases in the contra 
lateral longitudinal bundle a limited degeneration was found. In 
three animals (95, 93 and 111) the most proximal-dorsal cell group 
of the vestibulary-complex (BrcuTerew’s Nucleus) was struck; in 
this series a very limited degeneration on the side of the lesion 
in the lateral part of the bundle, rather mixing with the fibres of 
the fasc. Derrers ascendens (WINKLER *), could be followed up. All 
these ascendent degenerated (more medially in the areal of the 
longitudinal bundle after lesion of Derrers nucleus, more laterally 
after lesion of BrCHTEREW's nucleus) fibres can be followed up to 
the oculomotor nuclei, where as in all cases, some strands of fibres 
could be traced up to the nucleus of the posterior commissure. ‘The 
descending degeneration after lesion of the Dkiters complex is 
usually not very extensive, but present on both sides, regularly 
stronger on the side, where there is more marked ascending degene- 
ration. *) These fibres occupy, lower down, more and more a ven- 
tral situation and can be traced down to the cervical medulla and 
lower down. For reason of comparison one of Prosst’s experiments *) 
has been added to the table. 
The degeneration found in these cases seems to prove, that solely for 
the distal nuclei of the vestibulary complex (especially the triangular 
part) Fusr’s dictum holds. good, that the structural connection between 
the Derrers-complex and the longitudinal bundle is a crossed one. 
Here the results, obtained by GuppeN’s method, are reinforced by 
those of Marcui’s method. On the other hand with the latter method 
it appears hardly subject to doubt, that the connection between Brcn- 
TEREW’S nucleus and the longitudinal bundle is mainly a bomo-lateral 
one, these fibres mixing with the fasc. Drirers ascendens. 
Regarding the phenomena observed during life, it is surprising 
that, equally regularly as in group 2 manege-movement was observed 
to the non-sectioned side, equally regularly also in these animals 
1) Central Course of the nervus octavus. Verhandelingen der Koninklijke Aka- 
demie van Wetenschappen. Tweede sectie 1907. 
2) This detail seems to be able to support Ramon v Carar’s and MonAkows 
contention, that the fibres from the Detrers-complex to the posterior longitudinal 
fascicles all split up in an ascending and descending branch. 
5) Jahrbücher f. Psychiatrie 1901. P. 7 of the separate paper. 
