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. Author manuscript; available in PMC: 2010 Feb 10.
Published in final edited form as: IEEE Trans Neural Syst Rehabil Eng. 2009 Feb;17(1):31. doi: 10.1109/TNSRE.2008.2008285

Fig. 5.

Fig. 5

(a) Medial gastrocnemius EMG linear envelopes for day 1 and day 2 (Butterworth low-pass filter with zero lag and cutoff of 10 Hz) averaged across all subjects (n=10). Vertical black lines indicate toe-off. (b) Medial gastrocnemius root mean squared data averaged (black dots) for all subjects (grey area is +/− 1 SD) for each minute of walking with the exoskeleton. The horizontal black lines show +/− 2 standard deviations of group mean data from the last 15 min of day 2, representing steady state dynamics. These steady state envelopes are calculated from group mean data and are for display purposes only. Individual subject analyses were used for statistical tests.