A new translational platform for evaluating aging or pathology-related postural disorders

Ghulyan, Vénéra; Paolino, Marco; Lopez, Christophe; Dumitrescu, Michel; Lacour, Michel

doi:10.1080/00016480510026908

Cited by 30 publications

(23 citation statements)

References 21 publications

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“…In particular, important information on the dynamic of the CoP may be reached by applying nonlinear analysis methods such as the wavelet transformation method. Indeed, a study by Ghulyan et al (2005) demonstrated that a dynamic analysis of posture allows a better discrimination of the pathological effects on postural control.…”

Section: Introductionmentioning

confidence: 99%

Discriminant validity of spatial and temporal postural index in children with neurodevelopmental disorders

Bucci

Goulème

Stordeur³

et al. 2017

Intl J of Devlp Neuroscience

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Autism, learning disabilities and attention deficit/hyperactive disorder are often comorbid disorders. In order to try and find some markers that might be transnosographic, we hypothesized that abnormal postural sway profiles may discriminate children with neurodevelopmental disorders (NDDs) from typically developing children. The aim of our study was thus to compare spatial and temporal measures of the Center of Pressure in three distinct groups of children with NDDs (high functioning autism spectrum disorders, learning disabilities (dyslexia) and attention deficit/hyperactive disorders) and in typically developing children. Postural performances were thus evaluated in 92 children (23 per group, sex-, age- and IQ-matched groups) by using the Multitest Equilibre platform (Framiral). Two viewing conditions (eyes open and eyes closed) were tested on a stable and unstable platform. Results reported similar poor postural instability for the three groups of children with NDDs with respect to the typically developing children, and this was observed for both spatial as well as temporal analysis of displacement of the center of pressure. Such postural instability observed in children with NDDs could be due to impairment in using sensorial inputs to eliminate body sway, probably due to poor cerebellar integration.

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Section: Introductionmentioning

confidence: 99%

Discriminant validity of spatial and temporal postural index in children with neurodevelopmental disorders

Bucci

Goulème

Stordeur³

et al. 2017

Intl J of Devlp Neuroscience

View full text Add to dashboard Cite

show abstract

“…Such analysis reveals effects in the dynamics of the postural control system that are not shown by the more traditional posturography method based on spatial analysis only. A study by Ghulyan et al (2005) has demonstrated that dynamic postural analysis allowed a better discrimination of age effect on posture. Moreover, Lacour et al (2008) have described the limits of the traditional static posturography method, suggesting that the spatial analysis of the center of pressure could lead to misevaluations of the balance control system.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal postural analysis: a developmental study in healthy children

Goulème

Ezane

Wiener-Vacher

et al. 2014

Intl J of Devlp Neuroscience

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The aim of this study was to explore further the development of postural control in healthy children. The novelty of this study was to resort to both spatial and temporal analysis of the center of pressure (CoP). Forty-six healthy children from 4 to 16 years old (mean age: 9.1±3 years) and a group of 13 healthy adults (mean age: 25±3 years) participated to this study. Postural control was tested on both a stable and an unstable platform in three different visual conditions: eyes open fixating a target, under optocinetic stimulation, and eyes closed. Resul*ts showed a significant decrease of both surface area as well as mean velocity of the center of pressure (CoP) during childhood. With the children's increasing age, the spectral power indices decreased significantly and the canceling time increased significantly. Such improvement in postural control could be due to a better use of sensorial inputs and cerebellar integration during development, allowing subjects to achieve more efficient postural control.

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“…Other authors have proposed that evaluating postural control in challenging postures, instead of during a simple “standing upright” condition, may be necessary to detect alterations of postural control (e.g. [34], [48]). This point was beyond our aim, i.e.…”

Section: Discussionmentioning

confidence: 99%

Spherical Lenses and Prisms Lead to Postural Instability in Both Dyslexic and Non Dyslexic Adolescents

Kapoula

Gaertner²,

Matheron³

2012

PLoS ONE

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There is controversy as to whether dyslexic children present systematic postural deficiency. Clinicians use a combination of ophthalmic prisms and proprioceptive soles to improve postural performances. This study examines the effects of convergent prisms and spherical lenses on posture. Fourteen dyslexics (13–17 years-old) and 11 non dyslexics (13–16 years-old) participated in the study. Quiet stance posturography was performed with the TechnoConcept device while subjects fixated a target at eye-level from a distance of 1_m. Four conditions were run: normal viewing; viewing the target with spherical lenses of −1 diopter (ACCOM1) over each eye; viewing with −3 diopters over each eye (ACCOM3); viewing with a convergent prism of 8 diopters per eye. Relative to normal viewing, the −1 lenses increased the surface of body sway significantly whereas the −3 diopter lenses only resulted in a significant increase of antero-posterior body sway. Thus, adolescents would appear to cope more effectively with stronger conflicts rather than subtle ones. The prism condition resulted in a significant increase in both the surface and the antero-posterior body sway. Importantly, all of these effects were similar for the two groups. Wavelet analysis (time frequency domain) revealed high spectral power of antero-posterior sway for the prism condition in both groups. In the ACCOM3 condition, the spectral power of antero-posterior sway decreased for non dyslexics but increased for dyslexics suggesting that dyslexics encounter more difficulty with accommodation. The cancelling time for medium range frequency (believed to be controlled by the cerebellum), was shorter in dyslexics, suggesting fewer instances of optimal control. We conclude that dyslexics achieve similar postural performances albeit less efficiently. Prisms and lenses destabilize posture for all teenagers. Thus, contrary to adults, adolescents do not seem to use efferent, proprioceptive ocular motor signals to improve their posture, at least not immediately when confronted to convergence accommodation conflict.

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A new translational platform for evaluating aging or pathology-related postural disorders

Cited by 30 publications

References 21 publications

Discriminant validity of spatial and temporal postural index in children with neurodevelopmental disorders

Discriminant validity of spatial and temporal postural index in children with neurodevelopmental disorders

Spatial and temporal postural analysis: a developmental study in healthy children

Spherical Lenses and Prisms Lead to Postural Instability in Both Dyslexic and Non Dyslexic Adolescents

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