Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Effects of Modulation Type on Electrically-Elicited Tactile Sensation

전기자극 변조방식이 체성감각에 미치는 영향

  • Hwang, Sun-Hee (Department of Biomedical Engineering, Kyung Hee Univ.) ;
  • Ara, Jawshan (Department of Biomedical Engineering, Kyung Hee Univ.) ;
  • Song, Tong-Jin (Department of Biomedical Engineering, Jungwon Univ.) ;
  • Bae, Tae-Sue (Department of Biomedical Engineering, Jungwon Univ.) ;
  • Park, Sang-Hyuk (Department of Biomedical Engineering, Jungwon Univ.) ;
  • Khang, Gon (Department of Biomedical Engineering, Kyung Hee Univ.)
  • 황선희 (경희대학교 생체의공학과) ;
  • 아라 조샨 (경희대학교 생체의공학과) ;
  • 송동진 (중원대학교 의료공학과) ;
  • 배태수 (중원대학교 의료공학과) ;
  • 박상혁 (중원대학교 의료공학과) ;
  • 강곤 (경희대학교 생체의공학과)
  • Received : 2012.04.27
  • Accepted : 2012.05.23
  • Published : 2012.07.01
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Abstract

The purpose of this study was to investigate how the modulation method affects the effectiveness of eliciting tactile sensations by electrical stimulation. Two methods were employed and the results were compared and analyzed; pulse amplitude modulation (PAM) and pulse width modulation (PWM). Thirty-five healthy subjects participated in the experiments to measure the stimulation intensity that began to elicit a tactile sensation - activation threshold (AT). Constant-current monophasic rectangular pulse trains were employed, and the stimulation intensity was varied from zero until the subject felt any uncomfortable sensation. The step size of the stimulation intensity was 100nC/pulse. After each experiment, the subject described the sensation both quantitatively and qualitatively. The two modulation methods did not make a significant difference as far as the AT values were concerned, but most of the subjects showed 'intra-individual' consistency. Also, it was confirmed that our range of the stimulation parameters enabled us to obtain three major tactile sensations; tickling, pressure and vibration. The results suggested that the stimulation parameters and the modulation type should be selected for each individual and that selective electrical stimulation of the mechanoreceptors needs more diversified researches on the electrode design, multi-channel stimulation protocol, waveforms of the pulse train, etc.

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References

  1. Biddiss, E., Beaton, D., and Chau, T., "Consumer Design Priorities for Upper Limb Prosthetics," Disabil. Rehabil. Assist. Technol., Vol. 2, No. 6, pp. 346-357, 2007. https://doi.org/10.1080/17483100701714733
  2. Cipriani, C., Zaccone, F., Micera, S., and Carrozza, M. C., "On the Shared Control of an EMG-Controlled Prosthetic Hand: Analysis of User-Prosthesis Interaction," IEEE Trans. Robotics, Vol. 24, No. 1, pp. 170-184, 2008. https://doi.org/10.1109/TRO.2007.910708
  3. Antfolk, C., Balkenius, C., Rosen, B., Lundborg, G., and Sebelius, F., "Smarthand Tactile Display: A New Concept for Providing Sensory Feedback in Hand Prostheses," J. of PSHS, Vol. 44, No. 1, pp. 50-53, 2010.
  4. Jones, L. A. and Berris, M., "The Psychophysics of Temperature Perception and Thermal-Interface Design," Proc. of HIVETS, pp. 137-142, 2002.
  5. Chouvardas, V., Miliou, A., and Hatalis, M., "Tactile Displays: Overview and Recent Advances," Displays, Vol. 29, No. 3, pp. 185-194, 2008. https://doi.org/10.1016/j.displa.2007.07.003
  6. Konyo, M., Tadokoro, S., Yoshida, A., and Saiwaki, N., "A Tactile Synthesis Method Using Multiple Frequency Vibrations for Representing Virtual Touch," Proc. of IEEE/RSJ Int. Conf. on IROS, pp. 3965-3971, 2005.
  7. Kajimoto, H., Kawakami, N., and Tachi, S., "Electro-Tactile Display with Tactile Primary Color Approach," Proc. of Int. Conf. on IROS, 2004.
  8. Field-Fote, E. C., Anderson, B., Robertson, V. J., and Spielholz, N. I., "Monophasic and Biphasic Stimulation Evoke Different Responses," Muscle Nerve, Vol. 28, No. 2, pp. 239-241, 2003. https://doi.org/10.1002/mus.10414
  9. Rubinstein, J. T., Miller, C. A., Mino, H., and Abbas, P. J., "Analysis of Monophasic and Biphasic Electrical Stimulation of Nerve," IEEE Trans. Biomed. Eng., Vol. 48, No. 10, pp. 1065-1070, 2001. https://doi.org/10.1109/10.951508
  10. Giron, S., Hwang, S., Song, T., Rhee, K., and Khang, G., "Perception Caused by Current Amplitude Variation in Electro-Tactile Stimulation," Proc. of IFMBE, pp. 1190-1193, 2011.