Table 1 – Summary of early OLEs at electrodes having retinotopic labels for Patient 1, using common average reference (CAR), current source density (CSD) or broadband gamma power.

Numbers are OLE ± temporal error estimate for the OLE (see methods for further explanation), in milliseconds. Missing electrodes in CSD were excluded from the analysis because they reside on the edge of the occipital strip and therefore are not appropriate for CSD estimation. Two electrodes did not have a significant OLE using the broadband gamma power signals.

Electrode localization╲Reference used	CAR	CSD	Gamma-band Power
V1/V2d	50 ± 4	43 ± 3.5	47 ± 2
V1	60 ± 2	60 ± 2	64 ± 5.5
V2d	60 ± 3.5	58 ± 1.5	67 ± 3
V1/V2v	95 ± 3.5	76 ± 30	**
V2d/V3d	61 ± 3	*	67 ± 2.5
V3v/V2v	170 ± 10	*	**
IPS0	59 ± 2.5	60 ± 2.5	103 ± 8.5

^*- Electrode excluded from CSD analysis

^**- Electrode did not show a significant OLE