The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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Effects of Functional Electrical Stimulation Intensity Level on Corticomuscular Coherence during Action Observation

  • Kim, Ji Young (Department of Physical Therapy, Masan University) ;
  • Noh, Hyunju (Department of Nursing, Cheju halla University) ;
  • Park, Jiwon (Department of Physical Therapy, College of Rehabilitation Science, Daegu University)
  • Received : 2020.09.21
  • Accepted : 2020.10.30
  • Published : 2020.10.31
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Abstract

Purpose: This study examined the effects of changes in the intensity of Functional Electrical Stimulation (FES) on CorticoMuscular Coherence (CMC) during action observation. This paper presents a neurophysiological basis for the effective intensity of FES. Methods: Twenty-seven healthy volunteers were asked to observed a video with FES. The FES was provided with a sensory stimulation level, nerve stimulation level, and motor stimulation level. Simultaneously, an electroencephalogram (EEG) of the sensorimotor cortex and electromyogram (EMG) from the wrist extensor muscle were recorded. The peak CMC and average CMC were analyzed to compare the differences caused by the FES intensity. Results: The peak CMC showed a significant increase in the alpha band during motor stimulation (p<0.05). The average CMC showed a significant increase in the beta band during motor stimulation (p<0.05). Conclusion: The intensity of FES, which causes actual movement, increased the CMC during action observation. These results show that the intensity of the FES can affect the functional connection between the sensorimotor cortex and muscle.

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References

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