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. 2021 Jun 4;12:676723. doi: 10.3389/fneur.2021.676723

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Copyright © 2021 Straka, Paulin and Hoffman.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Ampulla of the anterior semicircular canal of the pike with incised window in which the cupula (Cup) can be seen. R = edges of the window. Freshly-produced preparation. The dark areas are Chinese ink particles. Lateral slit lamp illumination. Image captured on May 30, 1927 at 5.30. Beginning of the dissection at 2.10. Exposure time 9 min (to obtain the best possible depth effect, the exposure was set to 3 min, respectively, at 3 different depths). Objective Leitz 3. Ocular Leitz 1. Magnification 50x (Image number 30) (B). Same preparation. Cupula in motion (cf. text). Captured at 5.00, otherwise as (A) (Image number 29).