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Effect of Multi-Channel Vibration Stimulation on Somatosensory Sensibility  

Bae, Tae-Soo (Korea Orthopedics & Rehabilitation Engineering Center)
Kim, Hyung-Jae (Korea Orthopedics & Rehabilitation Engineering Center)
Kim, Sol-Bi (Korea Orthopedics & Rehabilitation Engineering Center)
Chang, Yun-Hee (Korea Orthopedics & Rehabilitation Engineering Center)
Kim, Shin-Ki (Korea Orthopedics & Rehabilitation Engineering Center)
Mun, Mu-Seong (Korea Orthopedics & Rehabilitation Engineering Center)
Publication Information
Journal of the Korean Society for Precision Engineering / v.28, no.6, 2011 , pp. 651-656 More about this Journal
Abstract
Although prosthetic training was received, most of amputees mainly depend on visual feedback to use prostheses, not on cutaneous and proprioceptive sensibility. Our objective of this study was to determine if there are changes in the somatosensory sensibility of amputees compared to non-amputees using multi-channel vibration stimulation system. One transradial amputees and ten non-amputees were involved. To investigate changes of residual somatosensory sensibility at stump, we set up custom-made vibration stimulation system including eight actuators (4 medial and 4 lateral) and GUI-based acquisition system. The results showed that there was similar pattern of subjective response at most of channels among group as stimulation increases. However, amputees' subjective response at channel 8 for 238Hz vibration was more sensitive than that of healthy persons. With respect to channels, response at channel 4 (medial) corresponding region to flexor carpi ulnaris for transradial amputees was most sensitive than other channels. In addition, sensitivity of four medial channels was on average about 0.5 scale than that of four lateral channels. Somatosensory sensibility was amputee, women, and men in sensibility order.
Keywords
Multi-Channel Stimulation; Somatosensory Sensibilly; Amputees; Vibration Frequency;
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