Rolling movements and the ascending vestibulary connections : (fasciculus Deiters ascendens) / by L.J.J. Muskens ; [communicated by J.K.A. Wertheim Salomonson].

  • Muskens, Louis Jacob Josef, 1872-1937.
Date:
1913
Catalogue details

Licence: In copyright

Credit: Rolling movements and the ascending vestibulary connections : (fasciculus Deiters ascendens) / by L.J.J. Muskens ; [communicated by J.K.A. Wertheim Salomonson]. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    7 rolling to that -side was observed. Also it strikes us that in both cases, no trace of degeneration in the P.L.B., and the F.D.A. was found. Also in an other experiment the degeneration is found in the Ramus deseendens and also this animal made in the latter days of its life rolling movements to the healthy side. Also after sagittal lesions, immediately lateral to the F. L. B., I observed a tendency to fall on the normal side. In this point case 146 and 158 complete each other very well. In 158 the extensive sagittal lesion cuts off the whole of the Deiters Complex from the raphe; in 146 the smaller and more caudal sagittal lesion begins exactly distally from the striae acusticae (Monakow). In both cases during a longer (158) and shorter (146) period a tendency to fall to the normal side was noted. Only in the proximal lesion we find the degeneration in the medial part of the F. D. A. In 146 nor in the Ramus deseendens nor in the F. D. A. a sufficient degeneration is found, to be held responsible for the “Slight tendency to fall to the right side” as was noted some days after the operation. It may be supposed, that the sagittal haemorrhage on the lateral side of the P. L. B. by mechanical compression should have interfered with the function of the Ramus deseendens and the Nue. Deiters, irritating it, but not causing the dissolution of medullary sheaths. In the case ot 158 in accordance with the crossed ascending vestibulo-mesen- cephalic bundle in the P. L. B. during 9 days circus movement to the normal side was noted; in 146 only during a few days some tendency to it. That the crossed ascending vestibulo-mesencephalic bundle not exclusively must be limited to the areal of the P. L. B. proper, we find confirmed not only in 158, but also in 113. The cases, which we have combined in group IV, (direct lesion of the P. L. B. system) can be divided after the physiological data into 2 subgroups. The first subgroup contains 7 animals, which during several days performed rolling movements to the side of the lesion. In all these animals the F.D.A. was either directly hurt by the lesion or was found in a decided state of degeneration, viz. as a result of lesion in the region immediately oral to the Deiters-coui- plex. The black granules as a proof of an intense ascending dege- neration (descending fibres are never found in the F.D.A.) we find only in 92, 93 and N°. 3 (Series of Besta) spread over the whole area; in the othet cases exclusively the lateral half of the F.D.A. is found degenerated, in 3 cases as a result of direct traumatical destruction of that part. Very instructive is in this regard 150, where exclusively the most lateral part of the F.D.A. was hurt about the Corpora quadrigemina posteriora, together with parts that