Postural Control During Visual and Kinesthetic Motor Imagery |
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Authors: | M Grangeon A Guillot C Collet |
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Institution: | 1.Centre de Recherche et d’Innovation sur le Sport (EA 647 - P3M),Université Claude Bernard Lyon I,Villeurbanne Cedex,France |
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Abstract: | Despite the accumulating evidence supporting an interaction between cognitive functions and postural control, little is known
about the selective impact of the mental representation of an action, i.e., motor imagery (MI) on postural control. As postural
oscillations are reduced during a cognitive task of backward silent counting, a greater stability is also expected during
MI compared to a no-task condition (standing). Twenty participants took part in this experiment, which aimed at providing
evidence that MI may improve postural stability. They were requested to mentally imagine a movement while standing on a force-plate.
Results showed a decrease in both path length and postural sway variability on the anterior-posterior and lateral axes during
all dual-task sessions, as compared to the motionless condition. These postural adjustments might result from both central
and peripheral processes, and/or increased muscle stiffness. Conversely, postural oscillation amplitude increased on the vertical
axis during MI of three vertical jumps, hence suggesting that postural regulations remain task-related during MI. Finally,
our data showed that kinesthetic and visual imagery differentially impacted the postural regulation. |
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