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Fig. 2 | BMC Neuroscience

Fig. 2

From: Driving steady-state visual evoked potentials at arbitrary frequencies using temporal interpolation of stimulus presentation

Fig. 2

a Isocontour voltage maps of SSVEP amplitudes averaged over all subjects at the four stimulation frequencies for non-interpolated (top-row) and interpolated (bottom-row) stimulation; b grand-average spectrum (top) and q-values comparing amplitudes (middle) elicited by interpolated vs. non-interpolated stimulation at a refresh rate of 85 Hz reveal clear artifacts of the interpolation technique. A comparison of the variance of the spectrum elicited by interpolated vs. non-interpolated stimulation (bottom) reveals no differences, indicating that artifacts were elicited consistently across participants; c no artifacts were apparent when stimulation was interpolated at a refresh rate of 120 Hz. 0 dB corresponds to 1 µV

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