Plantar biofeedback suppressed postural destabilization

NewsBot · May 29, 2008

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Postural destabilization induced by trunk extensor muscles fatigue is suppressed by use of a plantar pressure-based electro-tactile biofeedback.
Vuillerme N, Pinsault N, Chenu O, Fleury A, Payan Y, Demongeot J.
Eur J Appl Physiol. 2008 May 28. [Epub ahead of print]

Separate studies have reported that postural control during quiet standing could be (1) impaired with muscle fatigue localized at the lower back, and (2) improved through the use of plantar pressure-based electro-tactile biofeedback, under normal neuromuscular state. The aim of this experiment was to investigate whether this biofeedback could reduce postural destabilization induced by trunk extensor muscles. Ten healthy adults were asked to stand as immobile as possible in four experimental conditions: (1) no fatigue/no biofeedback, (2) no fatigue/biofeedback, (3) fatigue/no biofeedback and (4) fatigue/biofeedback. Muscular fatigue was achieved by performing trunk repetitive extensions until maximal exhaustion. The underlying principle of the biofeedback consisted of providing supplementary information related to foot sole pressure distribution through electro-tactile stimulation of the tongue. Centre of foot pressure (CoP) displacements were recorded using a force platform. Results showed (1) increased CoP displacements along the antero-posterior axis in the fatigue than no fatigue condition in the absence of biofeedback and (2) no significant difference between the no fatigue and fatigue conditions in the presence of biofeedback. This suggests that subjects were able to efficiently integrate an artificial plantar pressure information delivered through electro-tactile stimulation of the tongue that allowed them to suppress the destabilizing effect induced by trunk extensor muscles fatigue.
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efuller · May 29, 2008

"This suggests that subjects were able to efficiently integrate an artificial plantar pressure information delivered through electro-tactile stimulation of the tongue that allowed them to suppress the destabilizing effect induced by trunk extensor muscles fatigue."

Without reading the paper.

If we shock your tounge when you sway, you will stop swaying.

It would be interesting to hear what the electromechanical stimulus on the tounge was.

Cheers,

Eric

Admin2 · May 30, 2008

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Threads filed under neurophysiological

NewsBot · Jul 21, 2021

Does somatosensory feedback from the plantar foot sole contribute to verticality perception?
A Nedelkou et al
Somatosens Mot Res. 2021 Jul 13;1-9

Aim of the study: In upright standing, the human foot sole is the only point of contact with the ground conveying information about the pressure distribution under the feet. We examined how the altered somatosensory input from the plantar foot receptors, when standing on a soft surface, affects the subjective estimation of the earth vertical in different sensory contexts.

Materials and methods: Twelve (12) healthy young females (mean age: 21.8 ± 2.4 years) adjusted the orientation of a visual line (35 × 1.5 cm) representing the roll orientation of a hand-held (attached on a 24.9 × 4 cm cylinder) or head-attached electromagnetic tracking sensor (Nest of Birds, Ascension Technologies Inc., VT. USA, 60 Hz) under two visual conditions (eyes open, eyes closed) while standing on a soft or firm surface. The mean absolute (accuracy) and variable (precision) error in the verticality estimate was depicted in the sensor's roll deviation from the gravitational vertical.

Results: The accuracy and the precision of the estimate decreased in the absence of vision, while standing on the soft surface and when the estimate was provided by an active hand rather than head rotation. The surface effect was significant only in the absence of vision and when the estimate was provided by the hand.

Conclusions: The contribution of the plantar foot mechanoreceptors to gravity perception is sensory context dependent. Perception of the earth vertical is more accurate when estimated by active head rotation due to the integration of the vestibular and neck proprioceptive afferents.
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NewsBot · Aug 2, 2023

Can a thin mechanical stimulation on the plantar arch affect the head mobility? A preliminary report
Marco Alessandria, Simona Campisi & Taian M. Vieira
Sport Sciences for Health volume 19, pages495–501 (2023)

Background
Successfully controlling head posture demands the integration of sensory information arising from different receptors. Of particular interest is the influence of feet mechanoreceptors on the control of head position in space.

Aim
We ask whether a thin plantar insert can modify the range of motion (RoM) of the head and whether changes in RoM depend on the foot site where the insoles are positioned.

Methods
Twenty-four healthy subjects were randomly assigned to either experimental or control group. A plantar insole with a half-moon shape (1.5 mm thick) was used to stimulate the feet mechanoreceptors. For both groups, the head RoM in each of the three anatomical planes was assessed before and after participants walked for 15 min at 4 km/h on the treadmill. This procedure was applied four times for subjects in the experimental group: For each trial subjects walked with a plantar insole placed at a specific, foot location. Changes in head RoM were assessed through a symmetry index, accounting for differences in movement direction.

Results
In the control group, no pre–post differences in the symmetry index were observed for the sagittal, frontal and horizontal planes. Similarly, for the intervention group, ANOVA did not reveal both main and interaction effects of time and insole position on the symmetry index for the three planes of movement.

Conclusion
Our results do not evidence any effect of a 1.5-mm-thick mechanical stimulus on the head mobility, regardless of where the insole was placed for the latter group.
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Plantar biofeedback suppressed postural destabilization

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efuller MVP

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Plantar biofeedback suppressed postural destabilization

NewsBot The Admin that posts the news.

efuller MVP

Admin2 Administrator Staff Member

NewsBot The Admin that posts the news.

NewsBot The Admin that posts the news.

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Share This Page

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