舌置触觉生物反馈抑制肌肉疲劳对踝关节位置感的有害影响
Tongue-placed tactile biofeedback suppresses the deleterious effects of muscle fatigue on joint position sense at the ankle
摘要：
然而，在踝关节的位置感的敏锐度可能会受到肌肉疲劳的干扰，它最近也已被证明是改善，在正常的踝关节神经肌肉状态下，通过使用人工舌头放置触觉生物反馈。这种生物反馈的基本原理是通过舌头的电触觉刺激，为个体提供关于其匹配踝关节位置相对于其参考踝关节位置的位置的补充信息。在此背景下，本实验的目的是调查这种生物反馈是否可以减轻肌肉疲劳对踝关节位置感的有害影响。为了解决这个问题，16名年轻健康的大学生被要求执行主动踝关节匹配任务在两个条件下的无疲劳和疲劳的踝关节肌肉和两个条件下的无生物反馈和生物反馈。分别使用绝对误差和可变误差确定定位的总体准确度和可变性的测量。结果表明，生物反馈的可用性允许受试者抑制肌肉疲劳对踝关节位置感的有害影响。在感觉重新加权过程的背景下，这些研究结果表明，中枢神经系统能够整合和增加人工舌头放置的触觉生物反馈的相对贡献，以补偿踝关节的本体感受退化。
英文摘要：
Whereas the acuity of the position sense at the ankle can be disturbed by muscle fatigue, it recently also has been shown to be improved, under normal ankle neuromuscular state, through the use of an artificial tongue-placed tactile biofeedback. The underlying principle of this biofeedback consisted of supplying individuals with supplementary information about the position of their matching ankle position relative to their reference ankle position through electrotactile stimulation of the tongue. Within this context, the purpose of the present experiment was to investigate whether this biofeedback could mitigate the deleterious effect of muscle fatigue on joint position sense at the ankle. To address this objective, sixteen young healthy university students were asked to perform an active ankle-matching task in two conditions of No-fatigue and Fatigue of the ankle muscles and two conditions of No-biofeedback and Biofeedback. Measures of the overall accuracy and the variability of the positioning were determined using the absolute error and the variable error, respectively. Results showed that the availability of the biofeedback allowed the subjects to suppress the deleterious effects of muscle fatigue on joint position sense at the ankle. In the context of sensory re-weighting process, these findings suggested that the central nervous system was able to integrate and increase the relative contribution of the artificial tongue-placed tactile biofeedback to compensate for a proprioceptive degradation at the ankle.
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