| Summary: | 碩士 === 長庚大學 === 復健科學研究所 === 92 === Balance is a state of body equilibrium to move voluntarily, maintain a position and react to perturbations without falling. Sole of feet serve as the direct interface between human body and contact surface during walking and standing. Inputs from plantar cutaneous receptors may contribute to maintain our balance. However, the role of plantar cutaneous inputs on balance control and it’s interactions with other sensory elements in maintaining balance have not been fully explored. Therefore, the purpose of this study is to elucidate the influence of plantar cutaneous inputs on balance control and to investigate the interactions among plantar cutaneous inputs and other sensory elements in control of quiet stance for normal adults. Eighteen convenient-sampled normal healthy subjects (27.5±5.27 years old) were recruited to participate in this study. Balance performance on three different plantar cutaneous inputs conditions were evaluated under six different sensory scenario provided by SMART Balance Master System. Balance score and sway velocity were adapted as index of balance performance. Plantar cutaneous inputs were enhanced or decreased by applying a custom-made stimulating plate and a local anaesthetics (EMLA). A two-way repeated measures of ANOVA (3×6) with Post hoc analysis were performed to assess the changes of static standing balance performance under different sensory conditions. The results showed that balance performance were significantly improved by additional plantar cutaneous inputs in two sensory-conflicted conditions. However, no significant decreasing in balance performance were observed due to reduction of plantar cutaneous inputs. Therefore, additional feedback originated from plantar cutaneous receptors may provide supplementary information regarding balance control, especially in conditions with limited sensory inputs. While, diminished plantar cutaneous inputs could compensated by other sensory information in healthy participates to maintain static standing balance.
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