Table 3. Parameters (Par.) of fitted bivariate normal distributions for young participants.

Par.	Self-paced Movement				Externally-paced Movement
	TA		MG		TA		MG
	Left	Right	Left	Right	Left	Right	Left	Right
n	9	10	13	7	9	10	9	10
RMSD	1.46 ± 1.17	1.69 ± 2.01	1.27 ± 0.85	2.01 ± 1.35	2.37 ± 3.17	2.44 ± 4.61	1.96 ± 3.50	3.10 ± 6.40
COD	0.777 ± 0.122	0.808 ± 0.101	0.706 ± 0.146	0.742 ± 0.172	0.674 ± 0.125	0.770 ± 0.101	0.776 ± 0.140	0.671 ± 0.120
A	14.9 ± 21.2	16.2 ± 26.6	12.3 ± 19.2	23.3 ± 32.0	13.7 ± 22.8	18.3 ± 33.1	15.4 ± 29.0	21.3 ± 45.9
σRC	1.10 ± 0.19	1.03 ± 0.29	1.21 ± 0.43	1.22 ± 0.33	1.33 ± 0.17	1.12 ± 0.30	1.01 ± 0.23	1.20 ± 0.234
σML	1.35 ± 0.38	1.34 ± 0.80	1.33 ± 0.43	1.60 ± 0.76	1.79 ± 0.51	1.18 ± 0.39	1.55 ± 0.55	1.55 ± 0.399
μRC	0.0580 ± 0.3932	0.0136 ± 0.4688	0.265 ± 0.616	0.277 ± 0.516	0.400 ± 0.438	0.201 ± 0.658	0.516 ± 0.525	0.623 ± 0.738
μML	−2.86 × 10−3 ± 0.44	0.0194 ± 0.5592	0.0908 ± 0.7381	0.126 ± 0.577	−0.125 ± 0.383	0.0240 ± 0.5900	0.0790 ± 0.6149	0.340 ± 0.412

Each entry is the mean ± standard deviation for n cortical distributions of coherence between EEG signals and EMG signals from tibialis anterior (TA) and medial gastrocnemius (MG) muscles. RMSD stands for root-mean-square deviation, and COD stands for coefficient of determination. A, σ, and μ are respectively the peak value, standard deviation, and mean of the fitted bivariate normal distributions. A is measured in Hz multiplied by the percentage of movement cycle. The mean is located on the rostrocaudal-mediolateral (μ_RC, μ_ML) coordinate system, where (0,0) indicates C_z. A displacement by one on the coordinate system corresponds to a displacement by one electrode location in the rostrocaudal or mediolateral direction. Positive rostrocaudal and mediolateral coordinates respectively indicate anterior and left.