Tongue-placed tactile biofeedback suppresses the deleterious effects of muscle fatigue on joint position sense at the ankle |
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Authors: | Nicolas Vuillerme Matthieu Boisgontier Olivier Chenu Jacques Demongeot Yohan Payan |
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Institution: | (1) Laboratoire TIMC-IMAG, UMR UJF CNRS 5525, Faculté de Médecine, 38706 La Tronche Cédex, France |
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Abstract: | 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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Keywords: | Sensory re-weighting Biofeedback Proprioception Muscle fatigue Tongue display unit Ankle |
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