RESULT

And here is the result when we select the signal 4 of 'slp67x' after changing the background colour, which corresponds to an EEG from C3-A1 in mV sampled with a period of 0.004 s
 
 





   We  can centre the image to see more clearly the result. If we select the period of 0.004 s, adjust the number of atoms to 300, select the time from 0 to 15 seconds and the frequency from 0 to 20 Hz, this is what we obtain:
 
 






More information in HTML with some beautiful examples of seizures can be found at  Piotr J. Franaszczuk, Gregory K.Bergey and  Piotr J. Durka .