EMG data set time-frequency component using EEGLAB in MATLAB ?

Is there any way to analyze EMG data set time-frequency component using EEGLAB TOOLBOX in MATLAB ?

Answer 1

[Prasanna]

Hi Mano,

To analyse the time-frequency components of an EMG dataset using the EEGLAB toolbox, you can con preprocess your data into an EEGLAB recognized format, then perform the time-frequency analysis using the ‘pop_newtimef’ and the ‘newtimef’ functions in EEGLAB. The steps to perform time-frequency analysis on EMG data is as follows:

• Convert EMG data to EEGLAB recognized formats like ‘.set’. You can use the ‘pop_importdata’ and the ‘pop_saveset’ commands to do the same.

% Load data into EEGLAB structure 
EEG = pop_importdata('dataformat', 'array', 'nbchan', 1, 'data', 'your_emg_data', 'srate', 1000, 'pnts', 0, 'xmin', 0); 
% Save the data set 
EEG = pop_saveset(EEG, 'filename', 'emg_data.set'); 

• Once EMG data filtering, artifact removal and epoching is done, you can use EEGLAB’s time frequency analysis function ‘newtimef’ to do the same by adjusting the parameters as required.

% Perform time-frequency analysis 
[ersp, itc, powbase, times, freqs, erspboot, itcboot] = newtimef(EEG.data, EEG.pnts, [EEG.xmin EEG.xmax]*1000, EEG.srate, [3 0.5], 'plotersp', 'on', 'plotitc', 'off'); 

For more information on time-frequency analysis, you can refer the following documentations:

• Time-Frequency decomposition: https://eeglab.org/tutorials/08_Plot_data/Time-Frequency_decomposition.html
• EEGLAB functions (‘pop_newtimef’,’ newtimef’): https://eeglab.org/tutorials/ConceptsGuide/EEGLAB_functions.html

Hope this helps!