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. Author manuscript; available in PMC: 2016 Sep 1.
Published in final edited form as: Int J Psychophysiol. 2015 Jan 3;97(3):258–270. doi: 10.1016/j.ijpsycho.2014.12.011

Figure 2.

Figure 2

Grand mean (N = 130) ERP [µV] (NR: nose reference; LM: linked-mastoids reference; AR: average reference; REST: reference electrode standardization technique) and surface Laplacian [µV/cm2] (CSD: current source density) waveforms (−100 to 1000 ms, 100 ms pre-stimulus baseline) comparing stimulus presentations to the right (RVF) or left visual field (LVF) at mid-parieto-occipital sites (PO3/4; locations marked white in maps). Topographies plotted for each hemifield are two-dimensional representations of spherical spline interpolations (m = 2; λ = 0) derived from the corresponding N1 or N1 sink values at 125 ms (indicated by vertical line), using a symmetric scale optimized for each data range.