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. 2014 Feb 21;6(1):4. doi: 10.1186/1866-1955-6-4

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Copyright © 2014 Ribeiro et al.; 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/2.0), 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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Achromatic stimulation: neurofibromatosis type 1 (NF1) mean amplitude of the steady-state visual evoked potentials (VEPs) evoked by achromatic stimulation was not significantly different from control levels. (A and B) Grand averages of (A) elicited VEPs and (B) of the rectified VEPs used for analysis for each stimulus contrast used (labeled on the left) for the control and NF1 groups. Positive voltage is up. (C) Contrast response function of the mean amplitude of VEPs for the control (black open diamonds) and NF1 group (grey squares). All data are represented as mean ± 1 standard error of the mean.