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. 2020 Jun 5;11:505. doi: 10.3389/fneur.2020.00505

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Copyright © 2020 Rastoldo, Marouane, El Mahmoudi, Péricat, Bourdet, Timon-David, Dumas, Chabbert and Tighilet.

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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Locomotor velocity of UVN and Sham rats in the open field. (A) Curves illustrating the kinetics of the mean velocity (cm/s) of the head (calculated from the nose point) for UVN (red) and Sham (black) group. (B) Curves illustrating the kinetics of the maximum velocity (cm/s) of the head for UVN (red) and Sham (black) group. (C) Curves illustrating the kinetics of the mean velocity (cm/s) of the body (calculated from the center-point) for UVN (red) and Sham (black) group. (D) Curves illustrating the kinetics of the maximum velocity (cm/s) of the body for UVN (red) and Sham (black) group. (E) Curves illustrating the kinetics of the frequencies of the velocity of the head superior or equal to 100 cm/s, linked to the bobbing behavior (cephalic nystagmus) for UVN (red) and Sham (black) group. Bobbing behavior is defined when the velocity for the nose point is ≥ 100 cm/s. (F) illustration of the detection of body point by Ethovision™ throughout the recordings: nose point (blue triangle), center point (red circle), and tail base (purple square) of each animal. Data represent mean ± SEM; *P < 0.05, **P < 0.01, ***P < 0.001. A significant difference from the pre-operative value is indicated by * in black for the SHAM group. A significant difference from the pre-operative value is indicated by * in red for the UVN group. A significant difference between the SHAM and the UVN group is indicated with * in blue.