Frequency analysis of surface electromyograms (power spectrum) performed on facial muscles namely M. frontalis, M. orbicularis oculi and M. orbicularis oris. The range of the analysis was 0 to 1.0kHz. The results are as follows:
I. Relaxed, all muscles showed no effective components depend on frequency.
II. Activated, the components depend on frequency registered in the 80 to 500Hz range, while the main components registered about 150 to 200Hz. It suggests that facial muscles have more tonic components than phasic components.
III. The paralytic muscle of facial nerve paralysis showed no effective components during muscle contraction.
