13.16 Changes in center of pressure with stimulations viaanterior orthotic devices

Janin, Marc; Toussaint, Lucette

doi:10.1016/s0966-6362(05)80259-0

Cited by 19 publications

(12 citation statements)

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“…Our findings concerning the mean Y position of the CoP are consistent with the ones of Janin and Toussaint [ 9 ]: the plantar inserts, whether medial or lateral, entail a posteriorisation of the CoP and MAS has a more important action than LAS.…”

Section: Discussionsupporting

confidence: 91%

“…An abstract of Janin and Toussaint [ 9 ] suggested that a small number of stimulations have beneficial effects upon postural control. Our results are in line with theirs.…”

Section: Discussionmentioning

confidence: 99%

“…Yet, the effects of such thin stimulations on balance in quiet stance have been little studied so far. Only an abstract of Janin and Toussaint [ 9 ] suggests that they can decrease sway area, and this experiment was done in a gaze fixation condition. No study using specific thin plantar inserts was ever realized while the eyes were moving and none used the new methods of analysis of the CoP displacements.…”

Section: Introductionmentioning

confidence: 99%

“…Our first hypothesis (hyp.1) concerns postural control: relying on the results of Janin and Toussaint [ 9 ] we expect that a bilateral Medial or Lateral Arch Support (see Fig 1 ) would improve postural control, especially the Lateral Arch Support.…”

Section: Introductionmentioning

confidence: 99%

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Controlling Posture and Vergence Eye Movements in Quiet Stance: Effects of Thin Plantar Inserts

Foisy¹,

Gaertner²,

Matheron³

et al. 2015

PLoS ONE

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The purpose of this study was to assess properties of vergence and saccade eye movements as well as posture in quiet stance, and the effects of thin plantar inserts upon postural and oculomotor control. The performances of 36 young healthy subjects were recorded by a force platform and an eye tracker in three testing conditions: without plantar stimulation, with a 3 millimetre-thick plantar insert, either a Medial or a Lateral Arch Support (MAS / LAS). The results showed a decrease of the Surface and Variance of Speed and a more posterior position of the CoP with either stimulation compared with the control condition. The fractal analysis showed a decrease with MAS. Wavelet analysis in the time-frequency domain revealed an increase in the Cancelling Time of the low frequency band with MAS. These results suggest a better stability for a lower energy cost. Concerning eye movements, the inserts influenced only vergence (not saccades): MAS caused an increase of the phasic amplitude of divergence, and conversely a decrease of the tonic amplitude. In contrast, LAS caused an increase of the tonic amplitude of convergence. Thus, MAS renders divergence less visually driven, while LAS renders convergence more visually driven. We conclude that the CNS uses the podal signal for both postural and vergence control via specific mechanisms. Plantar inserts have an influence upon posture and vergence movements in a different way according to the part of the foot sole being stimulated. These results can be useful to clinicians interested in foot or eye.

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Section: Discussionsupporting

confidence: 91%

“…An abstract of Janin and Toussaint [ 9 ] suggested that a small number of stimulations have beneficial effects upon postural control. Our results are in line with theirs.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Controlling Posture and Vergence Eye Movements in Quiet Stance: Effects of Thin Plantar Inserts

Foisy¹,

Gaertner²,

Matheron³

et al. 2015

PLoS ONE

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show abstract

“…In clinical practice posturologists use such inserts to take care of patients suffering from postural disorders. Many studies have shown the effect of an orthotic treatment on standing postural stability (Janin et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

The effect of lateral and medial wedges on control of postural sway

Lefils-Capitain¹,

Bertucci

Lefils

2017

Computer Methods in Biomechanics and Biomedical Engineering

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The effect of age, sex and a firm-textured surface on postural control

et al. 2021

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In previous studies, the influence of plantar sensation has been examined using various textured surfaces with different stiffness materials to assess static balance. This study investigated the effects of a Firm Textured Surface (FTS) along with age and sex-related influences on postural control under different visual conditions. Forty subjects (20 elderly, 10 males, mean age 68.30, 10 females, mean age 68.00, and 20 young people, 10 males, mean age 25.45, 10 females, mean age 27.30) participated in this study maintained a quiet standing on FTS, foam and firm surfaces with eyes open and closed. The center of pressure displacement (CoPDISP), CoP velocity (CoPVEL), and sway velocity of the CoP in anteroposterior (AP) and mediolateral (ML) direction (VA/P and VM/L) were measured. FTS was associated with lower postural sway measures in both the groups with eyes open and closed. However, the foam surface showed the worst results in all postural parameters under all experimental conditions. Separate four-way ANOVAs were applied to each dependent variable. The main effects of surface (p < 0.0001), vision (p < 0.0001) and age (p < 0.0001 for CoPDISP, CoPVEL and VA/P; p = 0.0003 for VM/L) were significant in each of the four fitted models. Sex was never significant, either as a main effect or an interaction with other experimental factors. Eyes open were able to reduce the negative effects of the foam surfaces but without vision the proprioceptive sensory system cues of the body state become more important for maintaining balance. A good stimulation with rigid texture should be considered as relief to reduce the physiological-related decline of afferent information with age.

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13.16 Changes in center of pressure with stimulations viaanterior orthotic devices

Cited by 19 publications

References 0 publications

Controlling Posture and Vergence Eye Movements in Quiet Stance: Effects of Thin Plantar Inserts

Controlling Posture and Vergence Eye Movements in Quiet Stance: Effects of Thin Plantar Inserts

The effect of lateral and medial wedges on control of postural sway

The effect of age, sex and a firm-textured surface on postural control

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