An atlas of the medulla and midbrain : a laboratory manual / by Florence R. Sabin ; edited by Henry McE. Knower.

  • Florence R. Sabin
Date:
1901
Catalogue details

Licence: In copyright

Credit: An atlas of the medulla and midbrain : a laboratory manual / by Florence R. Sabin ; edited by Henry McE. Knower. Source: Wellcome Collection.

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    fact that they form a ridge on the medial surface of the brachium conjunctivum, which can be traced to the decussation. The entrance of this bundle into Bechterew’s nucleus is best seen in Figs.6 and 7. Fig. 6 is slightly torn. This decussation has been traced in connection with the brachium conjunctivum through Figs. 7 to 16 and Figs. 43 to 37. In Fig. 37 the brachium conjunctivum meets Bechterew’s nucleus. (3) The bundle from Deiters’ nucleus to the spinal cord has already been described and notice taken of the fact that it is not possible in these sections to trace this bundle all the way from the nucleus. (4) In a previous paper’ mention was made of two bundles of fibres connecting the vestibular nuclei with the cerebellum, one lying in the medial border of the inferior peduncle or corpus resti- forme, the other passing through the superior peduncle or brachium conjunctivum. Fig. 6 (F. v. ¢. [o.]) shows the lateral bundle with its coarse black fibres cut obliquely. The bundle appears to run toward Deiters’ nucleus. The medial bundle passing through the brachium conjunctivum cannot be distinguished in the longitudinal series from the fibres ending in the superior vestibular nucleus. In the transverse series it can be traced in Figs. 34 and 35. The contrast between these two bundles is brought out by following their direction. The lateral bundle follows the course of the corpus restiforme, and is seen entering the cerebellum on section No. 182, Fig. 36 (ef. with the oblique lines on Fig. 52). The mesial bundle is last seen in the roof of the cerebellum on section No. 146, Fig. 33. It passes spinalward, while the other bundle passes cerebralward. It is important to relate these two bundles as nearly as possible to the vestibular cerebellar bundles as described by Ramén y Cajal.’ On the Anatomical Relations of the Nuclei of Reception of the Coch- lear and Vestibular Nerves. Johns Hopkins Hosp. Bull., Balt., vol. viii (1897), pp. 253-259. Ramon y Cajal speaks of the vestibular cerebellar bundle as lying in the border of the corpus restiforme and corresponding to the fibres des- eribed by Forel, Sala and v. Koelliker, namely, the lateral vestibular fibres of v. Koelliker. He says that the bundle has end stations in Deiters’ nucleus, Bechterew’s nucleus, Ram6én y Cajal’s cerebello-acustic nucleus and the nucleus of the roof. It is the medial bundle of my series that runs to the nucleus of the roof (Fig. 35) but this bundle passes through the brachium conjunctivum, not the corpus restiforme. 6 -