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. 2017 Jan 24;11:4. doi: 10.3389/fnbeh.2017.00004

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Copyright © 2017 Varga, Kathman, Martin, Guo and Ritzmann.

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) or licensor 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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CX units are tuned to self-motion. Firing rate maps for locomotion initiated by antennal contact with the rod for representative CX units. The x-axis is the turning speed and the y-axis is the forward walking speed. Positive turning speed indicates right turning and negative turning speed indicates left turning. CX units showed discrete locomotion-related firing fields, such as left turning irrespective of forward walking speed (A, Z = 3.59, P < 0.01), forward walking to the left (B, Z = 4.08, P < 0.01), forward walking irrespective of turning speed (C, Z = 5.73, P < 0.01), forward walking to the right (D, Z = 6.00, P < 0.01), and right turning irrespective of forward walking speed (E, Z = 2.33, P < 0.01). Reproduced with permission from Guo and Ritzmann (2013).