Table I.

MZ twin correlations per sensor group

	RO (10)	LO (9)	RP (9)	LP (9)	RC (15)	LC (15)	RT (21)	LT (21)	RF (16)	LF (15)	Z (9)	Sensor mean
Delta	0.82 (0.59–0.93)	0.82 (0.59–0.93)	0.82 (0.59–0.93)	0.87 (0.70–0.95)	0.86 (0.67–0.94)	0.85 (0.65–0.94)	0.69 (0.36–0.87)	0.56 (0.16–0.80)	0.84 (0.63–0.94)	0.66 (0.31–0.85)	0.87 (0.70–0.95)	0.79
Theta	0.90 (0.76–0.96)	0.89 (0.74–0.96)	0.87 (0.70–0.95)	0.92 (0.81–0.97)	0.89 (0.74–0.96)	0.91 (0.78–0.96)	0.76 (0.48–0.90)	0.73 (0.43–0.89)	0.86 (0.67–0.94)	0.69 (0.36–0.87)	0.92 (0.81–0.97)	0.85
Alpha	0.94 (0.85–0.98)	0.94 (0.85–0.98)	0.89 (0.74–0.96)	0.90 (0.76–0.96)	0.84 (0.63–0.94)	0.84 (0.63–0.94)	0.85 (0.65–0.94)	0.85 (0.65–0.94)	0.86 (0.67–0.94)	0.77 (0.50–0.90)	0.95 (0.88–0.98)	0.88
Beta	0.89 (0.74–0.96)	0.91 (0.78–0.96)	0.88 (0.72–0.95)	0.94 (0.85–0.98)	0.90 (0.76–0.96)	0.89 (0.74–0.96)	0.78 (0.52–0.91)	0.81 (0.57–0.92)	0.90 (0.76–0.96)	0.80 (0.55–0.92)	0.94 (0.85–0.98)	0.88
Band mean	0.89	0.89	0.87	0.91	0.87	0.87	0.77	0.74	0.87	0.73	0.92

Pearson's correlations (and 95% confidence intervals) between MZ twins of log10 transformed mean powers, averaged across sensors for 11 MEG sensorgroups defined according to scalp location: LO and RO: left and right occipital; LP and RP: parietal; LC and RC: central; LT and RT: temporal; LF and RF: frontal; Z: midline sensors. The number of individual sensors in each sensorgroup is indicated within brackets (one left occipital and one left frontal MEG sensor was excluded due to bad recording quality). All correlation coefficients were significant at p < 0.001, except for the delta band at sensorgroups LT and LF: p ≤ 0.01.