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. 2019 Apr 12;10(1):78–86. doi: 10.1080/21655979.2019.1599628

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© 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 6. — An analysis of the optimum frequency. The blue color indicates Rat No. 1 and the orange color indicates the Rat No 5 at three frequencies of 100, 250, and 400 Hz. The average key pressure in both rats dropped at 250 Hz, rising again at 400 Hz. The best response to stimulation was at 400 Hz.