Section: New Results

Evoked EMG correlation with muscle torque

Participants : Adriana Mendes, Mitsuhiro Hayashibe, David Guiraud.

During the internship, we developed software, based on algorithms available in literature, that allow to recover M-Wave induced by surface FES. The algorithm detects the onset of the artifact, the Otsu method is used to determine the length of the contaminated data and finally, the M-wave is interpolated through Cubic Hermite extensions. The results can be seen on Figure 15 where the M-wave, fully reconstructed can then be quantified. We thus verified that the classical torque-EMG relationship can be recovered using MAV, RMS or P2P and the results show a very good correlation. Finally we successfully developed a realtime version of the processing and tested it through a closed loop control of the FES through EMG measurements. The technology used was completely wireless (Delsys for the EMG and Vivaltis for the stimulation). One journal paper is under writing in collaboration with the Technological University of Compiègne.

Figure 15. Reconstructed M-Wave