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. 2015 May 12;9:265. doi: 10.3389/fnins.2015.00265

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Copyright © 2015 Brunton, Winther-Jensen, Wang, Yan, Hagh Gooie, Lowery and Rajan.

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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Stimulation currents used versus the geometric surface area of the electrode. (A) Threshold current, (B) saturation current, and (C) dynamic range. TiN coated electrodes are indicated by open circles and uncoated PtIr electrodes are indicated by solid squares. The numbers to the left of a marker indicates the corresponding number of PtIr overlapping data points, the numbers to the right of a marker indicates the corresponding number of TiN overlapping data points. No number indicates only one electrode.