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. 2017 Nov 14;8:600. doi: 10.3389/fneur.2017.00600

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Copyright © 2017 Guinand, Van de Berg, Cavuscens, Ranieri, Schneider, Lucieer, Kingma, Guyot and Pérez Fornos.

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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Illustration of the electrical stimulation paradigm and its expected effects on the stimulation output. Examples of different linear transfer functions with slopes ranging from −1 to +2 are presented. Note that the increase in the output (modulation strength) is steeper for larger slopes. Positive slopes (yellow, blue, and green solid lines) generate excitatory stimulation (up-modulation) for excitatory head movements and inhibitory stimulation (down-modulation) for inhibitory head movements. Negative slopes (pink solid line) have the opposite behavior.