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. 2020 May 13;19(4):550–561. doi: 10.1007/s12311-020-01133-7

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Text and drawings on this sheet of da Vinci are devoted to the preparation of molds of the ventricular system. Upper left is a lateral view of the ventricles. In the center, the ventricles are projected onto the facing halves of a sagittally sectioned brain. Lower right is an oblique view of the ventricles, with the fourth ventricle continuing in the spinal cord. Lower left a ventral view of the brain of an ox