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. Author manuscript; available in PMC: 2018 Jul 1.
Published in final edited form as: Brain Topogr. 2017 May 4;30(4):450–460. doi: 10.1007/s10548-016-0530-2

Figure 4. C1 component variation as a function of size and contrast.

Figure 4

A) Visual evoked potential waveforms for each size and contrast. Amplitude clearly increased with both contrast and size. B) The contrast response function of C1 peak amplitude exhibited a monotonic increase in negative potential with increasing stimulus diameter and contrast. Conditions for which a reliable C1 component was not elicited are omitted. Error bars reflect the standard error of the mean across subjects, estimated through a Jackknife procedure. C) C1 peak latency increased strongly with decreasing contrast, and stimulus size.