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. 2018 Feb 6;8(2):28. doi: 10.3390/brainsci8020028

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Influence of grounding the guide tube. Electric field (EF) isocontours (0.2 V/mm) simulated in homogeneous grey matter setting the MER stimulation contact to 1 to 4 mA in 1 mA steps. (A) Guide tube at target position set to ground (GND), (B) guide tube set to floating potential (FP), outer boundaries of the model set to ground. (C) EF isocontours overlapped to compare the EF when the guide tube is grounded and set to floating potential. EF simulated placing the MER electrode at different distances from the guide tube (distance to target: +4 mm, 0 mm, −7 mm, −10 mm) exemplified for amplitudes between 1 to 4 mA. Numbers in front of the active contact indicate the maximum distance of the isocontour to the lead axis.