Multichannel Surface EMG Decomposition Based on Measurement Correlation and LMMSE

Table 2

Parameters (mean ± std. dev.) obtained from all channels and two independent channel groups.

Methods	Contraction force (N)	2	4	6	8
GCKC	Number of MUs extracted from all channels	5.7 ± 2.5	8.0 ± 0.0	5.7 ± 4.0	6.7 ± 2.3
MC-LMMSE	Number of MUs extracted from all channels	11.7 ± 4.5	13 ± 1.7	11 ± 3.5	13 ± 1.5
	Number of MUs extracted from channels in Group 1	9.3 ± 4.5	9.0 ± 0.0	7.7 ± 3.5	7.3 ± 1.5
	Number of MUs extracted from channels in Group 2	8.7 ± 3.5	9.0 ± 1.0	7.7 ± 2.1	8.0 ± 1.7
	Number of common MUs extracted from both groups	7.7 ± 4.0	8.7 ± 0.6	6.7 ± 2.5	7.3 ± 1.5
	Percentage of common pulses in common MUs (%)	90 ± 6	92 ± 5	94 ± 4	95 ± 5