Early cross-shaft voltage shapes had a mean late projection of 0.011 SD above shift controls in seven SEEG rest recordings without pulses.

We tested whether a theta trigger selects a later voltage shape on another electrode shaft without a pulse. We used seven public SEEG rest recordings from OpenNeuro ds006065 version 1.0.0. Four bipolar pairs per person were selected from early data. We tested all 68 directed edges between different shaft labels. We fixed each voltage shape in seconds 2 to 58. We measured its signed projection in seconds 122 to 238. The mean projection above 500 time-shift controls was 0.01085 early readout standard deviations. Six of seven participant values were positive. The descriptive bootstrap 95 percent interval was 0.00094 to 0.01947. The two-sided participant sign-flip test gave p = 0.09375. Thus, evidence for a positive effect across participants was uncertain. The group timing reference gave p = 0.00599, under an assumption of stable signals within the late block. Clipping large readout values gave a mean of 0.01107. We preserve the traces, source checks, code, results, and three figures. These are voltage patterns that depend on a trigger. They do not show an effect of stimulation or a causal brain connection. This is an extension on seven previously used recordings, not an independent sample.

stereoelectroencephalography · theta phase · phase-triggered average · time-shift control · cross-shaft projection · brain-computer interface