Table 4.

Regional differences in coupling phase

	anterior vs. central			anterior vs. posterior			central vs. posterior
	mean ± SD	P	N	mean ± SD	P	N	mean ± SD	P	N
N3 fast	24 ± 36*	0.01	24	31 ± 38	0.04	18	5 ± 34*	0.50	18
N2 fast	7 ± 39	0.65	23	3 ± 35	0.90	13	−18 ± 49	0.25	13
N3 slow	26 ± 44*	0.005	24	19 ± 61	0.72	18	−1 ± 60*	0.77	18
N2 slow	6 ± 47	0.80	23	–5 ± 62	0.34	13	9 ± 62*	0.38	13

Indicated are mean phase difference (±SD), p value (uncorrected) of one-sample t-test vs. zero, and number of included participants. Note that for these analyses, participants are included only when they have ≥20 SOs on at least one electrode in each of the compared regions.

Bold entries: Significant phase difference on Night 1 (shown in Figure 6).

Asterisks: Significant phase difference on Night 2.