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. 2014 Apr 29;13:52. doi: 10.1186/1475-925X-13-52

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Copyright © 2014 Gramatikov; licensee BioMed Central Ltd.

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 credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Signals produced by RBS: a) during central fixation and b) during para-central fixation. The power spectrum (c) contains two peaks – one at 2f_s, characteristic of central fixation, and one at f_s, characteristic of para-central fixation.