206 Practical Biomedical Signal Analysis Using MATLAB
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force, muscle fatigue, and the condition of unused muscles and muscles in chronic
pain syndromes are considered in [Fuglsang-Frederiksen, 2000].
In the system proposed by Pattichis and coworkers [Pattichis and Elia, 1999] for
differentiation of myogenic and neurogenic signals from normal EMG, both time
domain and frequency domain features of EMG were considered. The following
time-domain parameters were automatically determined: 1) MUAP duration,2) spike
duration measured from the first to the last positive peak, 3) amplitude: difference
between the minimum positive peak and maximum negative peak, 4) area: sum of
the rectified MUAP integrated over its duration, 5) spike area: sum of the rectifi