Analysis of EMG signals of patients with essential tremor focusing on the change of tremor frequency

Yuya Matsumoto, Masatoshi Seki, Takeshi Ando, Yo Kobayashi, Hiroshi Iijima, Masanori Nagaoka, Masakatsu G. Fujie

研究成果: Conference contribution

抄録

Essential tremor is a disorder that causes involuntary oscillations in patients while engaging in actions or while maintaining a posture. ET patients have serious difficulties in performing activities of daily living such as eating food, drinking water, and writing. We have thus been developing an EMG-controlled exoskeletal robot to suppress tremors. The EMG signal of ET patients involves a mix of voluntary movement and tremor signals. To control the exoskeletal robot accurately, tremor signals must be removed from the patient's EMG signal. To date, we have been developing a filter to remove tremor signals from the patient's EMG. The design of this filter was based on the hypothesis that the rectified tremor signals are able to be approximated by a powered sine wave. This filter was found to have a large effect on removing tremor signals. However, tremor signals are generated both while performing voluntary movement and while maintaining a posture, and the filter was attenuating both signals. To control this robot accurately, the signal generated while performing voluntary movement is expected not to be attenuated. To accomplish this, we try to use a parameter that reflects a state of the patient's movement, performing a voluntary movement or maintaining a posture, as a switch to activate the powered sine filter. This paper provides an analysis of the favorable parameters. We focus on two parameters: the peak-to-peak interval of the rectified EMG signal, and the interval of the flat and low amplitude area of the rectified EMG signal. Through evaluation, it is affirmed that both parameters change with the state of the patient's movement. However, the latter parameter is superior to the former in terms of variability, which indicates that the interval of the flat and low amplitude area of the rectified EMG signal is a more favorable parameter to promote control of the exoskeletal robot. As a future work, we will mount the parameter to the algorithm and evaluate the robotic system.

元の言語English
ホスト出版物のタイトルProceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
ページ2244-2250
ページ数7
DOI
出版物ステータスPublished - 2012
イベント34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2012 - San Diego, CA
継続期間: 2012 8 282012 9 1

Other

Other34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2012
San Diego, CA
期間12/8/2812/9/1

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Essential Tremor
Tremor
Robots
Posture
Potable water
Robotics
Switches
Activities of Daily Living
Drinking Water
Eating
Food

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Signal Processing
  • Biomedical Engineering
  • Health Informatics

これを引用

Matsumoto, Y., Seki, M., Ando, T., Kobayashi, Y., Iijima, H., Nagaoka, M., & Fujie, M. G. (2012). Analysis of EMG signals of patients with essential tremor focusing on the change of tremor frequency. : Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS (pp. 2244-2250). [6346409] https://doi.org/10.1109/EMBC.2012.6346409

Analysis of EMG signals of patients with essential tremor focusing on the change of tremor frequency. / Matsumoto, Yuya; Seki, Masatoshi; Ando, Takeshi; Kobayashi, Yo; Iijima, Hiroshi; Nagaoka, Masanori; Fujie, Masakatsu G.

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS. 2012. p. 2244-2250 6346409.

研究成果: Conference contribution

Matsumoto, Y, Seki, M, Ando, T, Kobayashi, Y, Iijima, H, Nagaoka, M & Fujie, MG 2012, Analysis of EMG signals of patients with essential tremor focusing on the change of tremor frequency. : Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS., 6346409, pp. 2244-2250, 34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2012, San Diego, CA, 12/8/28. https://doi.org/10.1109/EMBC.2012.6346409
Matsumoto Y, Seki M, Ando T, Kobayashi Y, Iijima H, Nagaoka M その他. Analysis of EMG signals of patients with essential tremor focusing on the change of tremor frequency. : Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS. 2012. p. 2244-2250. 6346409 https://doi.org/10.1109/EMBC.2012.6346409
Matsumoto, Yuya ; Seki, Masatoshi ; Ando, Takeshi ; Kobayashi, Yo ; Iijima, Hiroshi ; Nagaoka, Masanori ; Fujie, Masakatsu G. / Analysis of EMG signals of patients with essential tremor focusing on the change of tremor frequency. Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS. 2012. pp. 2244-2250
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