Fig. 6.

a Example of a normalized full-wave rectified and enveloped signal from left (blue line) and right (green line) tibialis anterior and left (orange line) and right (brown line) gastrocnemius lateralis, superimposed to left basographic signal (violet line), in two strides of a representative subject. b, d Two representative 20-sample windows taken from the swing phases of the signal depicted in a. c, e Two representative 20-sample windows taken from the stance phases of the signal depicted in panel a)