Queries regarding MOtoNMS
Posted: Wed Aug 12, 2015 10:07 am
I would like to thank you for developing a great toolbox. I have a few queries that I would really appreciate it if you be able to answer please.
1) One of the input quantities required for running CEINMS simulation is muscle excitations which are simply the normalized linear envelope of EMG experimental data. In CEINMS manual, it has been suggested that the MVC of each muscle to be used for normalization of EMG signal. However, MOtoNMS uses the maximum peak from each muscle of all trials (if multiple trials were chosen for elaboration) to normalize the data. I would like to know if this is a correct procedure in general? would it be alright to proceed with maximum peak defined for each muscle as a normalization technique? if no, is it possible to implement MVC data in MOtoNMS?
1.1) In addition would it be acceptable if normalisation has been done trial by trial or normalisation must be done all together based on the single highest value for each muscle?
1.2) in case of 1.1, In ElaborationInterface, in the section where we need to 'select trials to Max EMG', If we select all the trials, will this find the maximum value for each muscle from all trials and divide that value to the corresponding muscle for each trial? would that be the correct procedure?
2) In the dynamicElaboration, the EMG result has been plotted for different muscles (AllNormalizedEnvelopes) in which Y axis has been labelled as normalized Envelope (%max). Thereby as an example, if 6 trials are included in dynamicElaboration, would the AllNormalizedEnvelopes plot be the average of all the signals for each individual muscle from all trials??
2.1) In addition, in the plot of an individual muscle, the amplitude (micro volt) is normalised to Maximum peak and represented as percentage. If the signal represents muscle excitation, Do 0% and 100% mean that muscle is not active and fully active, respectively? and what does it mean if the peak of the signal show 20% (e.g. y axis for rectus femoris is 20%)?
3) Is there an option in MOtoNMS to calculate muscle activation from muscle excitation?
1) One of the input quantities required for running CEINMS simulation is muscle excitations which are simply the normalized linear envelope of EMG experimental data. In CEINMS manual, it has been suggested that the MVC of each muscle to be used for normalization of EMG signal. However, MOtoNMS uses the maximum peak from each muscle of all trials (if multiple trials were chosen for elaboration) to normalize the data. I would like to know if this is a correct procedure in general? would it be alright to proceed with maximum peak defined for each muscle as a normalization technique? if no, is it possible to implement MVC data in MOtoNMS?
1.1) In addition would it be acceptable if normalisation has been done trial by trial or normalisation must be done all together based on the single highest value for each muscle?
1.2) in case of 1.1, In ElaborationInterface, in the section where we need to 'select trials to Max EMG', If we select all the trials, will this find the maximum value for each muscle from all trials and divide that value to the corresponding muscle for each trial? would that be the correct procedure?
2) In the dynamicElaboration, the EMG result has been plotted for different muscles (AllNormalizedEnvelopes) in which Y axis has been labelled as normalized Envelope (%max). Thereby as an example, if 6 trials are included in dynamicElaboration, would the AllNormalizedEnvelopes plot be the average of all the signals for each individual muscle from all trials??
2.1) In addition, in the plot of an individual muscle, the amplitude (micro volt) is normalised to Maximum peak and represented as percentage. If the signal represents muscle excitation, Do 0% and 100% mean that muscle is not active and fully active, respectively? and what does it mean if the peak of the signal show 20% (e.g. y axis for rectus femoris is 20%)?
3) Is there an option in MOtoNMS to calculate muscle activation from muscle excitation?