Figure 4. Effect of ‘blind separation’ single subject data.

The cross-correlation between the non-separated and separated third-order differential of the EMGs recorded from AbPB and 1DI of a healthy subject during a precision grip task. A, cross-correlation for the non-separated unrectified signals. B, cross-correlation of the separated unrectified signals. C, cross-correlation of the non-separated rectified signals. D, the cross-correlation of the separated rectified signals. All the cross-correlations were calculated across the entire time of the ramp task, a period of ∼510 s.