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http://dx.doi.org/10.7736/KSPE.2012.29.7.705

The Measurement of the Magnitude of Sensory Perception and Displeasure to the Vibration Stimuli applied on Forearm in upper Limb Amputees  

Kim, Sol-Bi (Korea Orthopedics and Rehabilitation Engineering center)
Chang, Yun-Hee (Korea Orthopedics and Rehabilitation Engineering center)
Kim, Shin-Ki (Korea Orthopedics and Rehabilitation Engineering center)
Kim, Gyoo-Suk (Korea Orthopedics and Rehabilitation Engineering center)
Mun, Mu-Sung (Korea Orthopedics and Rehabilitation Engineering center)
Bae, Tae-Soo (Department of Medical Engineering Jungwon Univ.)
Publication Information
Journal of the Korean Society for Precision Engineering / v.29, no.7, 2012 , pp. 705-710 More about this Journal
Abstract
Research involving discomfort or pain related to haptic vibratory stimulation the for prosthesis users of myoelectrical hand is very lacking. Our objective of this study was to evaluate the displeasure and sensitivity of areas in forearm using vibration stimulation system between upper limb amputees and non-amputees. Twenty transradial amputees and forty non-amputees (20 youth, 20 elderly) were involved. We set up custom-made vibration stimulation system including eight actuators (4 medial parts and 4 lateral parts) and GUI-based acquisition system, to investigate changes of residual somatosensory sensibility and displeasure at proximal 25% of forearm. Eight vibration actuators were attached to the circumference of proximal 25% point of forearm at regular intervals. Sensitivity tests were used to stimulate the 120Hz and discomfort experiment was used to 37 ~ 223Hz. The subjective responses were evaluated by 10 point scale. The results showed that both groups were similar in sensitive areas. Response at around of radius was most sensitive than other areas in all subjects. Elderly group do not appear discomfort of vibrotactile; however, youth group and amputee presented discomfort of vibrotactile. Prosthesis with a vibrotactile feedback system should be developed considering the sensitivity. Furthermore, Future studies should investigate the scope of application of that principle.
Keywords
Vibration Sensory Perception; Sensory Feedback System; Upper Limb Amputees; Magnitude estimation; Displeasure;
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