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. 2020 Jun 23;14:167. doi: 10.3389/fncel.2020.00167

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Copyright © 2020 Slaoui Hasnaoui, Arsenault, Verdier, Obeid and Kolta.

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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Distribution of motoneurons activated by stimulation of different divisions of NVsnpr. (A) Schematic drawing of the brainstem slice preparation and the experimental conditions used. (B) Photomicrograph showing the position of the responsive cells in NVmt following electrical stimulation of the dorsal NVsnpr and their Ca²⁺-responses in panel (C). Some showed a transient response at every stimulation pulse (e.g., trace 7), while others had persistent responses (e.g., trace 5) or only one large transient response with or without a few much smaller ones afterward. Gray vertical line indicates the length of the train of stimulation. (D) Percentage of NVsnpr cells presenting transient vs. persistent responses. (E) Left: distribution of all responsive motoneurons according to the site of electrical stimulation in NVsnpr. Right: vertical bars chart reporting the number of responsive motoneurons according to the site of electrical stimulation in the NVsnpr. (F) Vertical bars chart reporting the number of responsive motoneurons per trial according to the site of electrical stimulation in the NVsnpr. (G) Heatmaps illustrating the location of responsive motoneurons within the NVmt according to the site of electrical stimulation in the NVsnpr. Abbreviations: Stim, stimulation; NVsnpr, trigeminal main sensory nucleus; NVmt, trigeminal motor nucleus.