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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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Blue-yellow stimulation: visual evoked potentials (VEPs) elicited by blue-yellow stimulation, in patients with neurofibromatosis type 1 (NF1) and controls, revealed significant differences between the groups in the amplitude of the late responses between 250 and 350 ms after stimulus phase-reversal. (A) Grand averages of the elicited VEPs for each stimulus contrast (labeled on the left) for the control and NF1 groups. Positive voltage is up. (B) Contrast response functions for P1 amplitude and latency. (C) Contrast response functions for P2 amplitude and latency. (D) Contrast response function for the VEPs’ mean amplitude between 250 and 350 ms after phase reversal (LC). All data are represented as mean ± 1 standard error of the mean.