The D+R Balance application: a novel method of assessing postural sway

2015 ◽  
Vol 129 (8) ◽  
pp. 773-778 ◽  
Author(s):  
C Yvon ◽  
A Najuko-Mafemera ◽  
R Kanegaonkar
Keyword(s):  
Healthy Volunteers ◽  
Feasibility Study ◽  
Postural Sway ◽  
Dynamic Posturography ◽  
Eyes Closed ◽  
Novel Method ◽  
Iphone Application ◽  
Romberg Test ◽  
Potential Use ◽  
Hard Floor

AbstractBackground:Postural sway can be assessed clinically using the Romberg test, or quantified using dynamic posturography. We assessed the potential use of a novel iPhone application as a method of quantifying sway.Methods:Fifty healthy volunteers performed the Romberg and tandem Romberg tests on a hard floor and on foam in soundproofed and normal clinic rooms. Postural sway was recorded using the D+R Balance application and data were compared using pairedt-tests.Results:Significantly more postural sway was noted in participants when standing with their eyes closed and feet in the ‘tandem’ positionvsfeet together; standing with their eyes closed on foamvson the floor; and standing with their eyes closed on foam with feet in the tandem positionvson the floor with feet together.Conclusion:This feasibility study suggests that the iPhone D+R Balance application deserves further investigation as a means of assessing postural sway and may provide an alternative to current dynamic posturography systems.

Original study. The clinical value of foam posturography in assessing patients with peripheral vestibular dysfunction – our experience

2017 ◽  
Vol 7 (26) ◽  
pp. 93-101
Author(s):  
Raluca Enache ◽  
Dorin Sarafoleanu ◽  
Codrut Sarafoleanu
Keyword(s):  
Center Of Pressure ◽  
Balance Control ◽  
Vestibular Dysfunction ◽  
Control Group ◽  
Vestibular Disorders ◽  
Clinical Value ◽  
Dynamic Posturography ◽  
Eyes Closed ◽  
Peripheral Vestibulopathy ◽  
Romberg Test

Abstract BACKGROUND. Computerized dynamic posturography is the most important battery test designed to assess the ability to use visual, vestibular and proprioceptive cues in the maintenance of posture. Foam posturography reduces the availability of proprioceptive inputs, which makes more difficult the balance control. OBJECTIVE. The objective of the study was to assess the clinical use of foam posturography in evaluating peripheral vestibular dysfunction. MATERIAL AND METHODS. We evaluated 41 patients with vestibular disorders and 41 normal patients by using the sensory organization test in eyes opened, eyes closed and mislead vision conditions with and without the foam. We measured several parameters: the position of the center of pressure, the displacement in the center of pressure in anteroposterior and mediolateral planes and Romberg’s ratio on static and foam rubber. RESULTS. The values of all parameters were significantly higher in patients with peripheral vestibular disorders than in the control group (p<0.05). Also. comparing the Romberg test results, the foam surface used by the patient was larger than the static one. CONCLUSION. Foam posturography can be a reliable test in assessing patients with peripheral vestibulopathy, being also able to identify the visual and proprioceptive dependence levels.

scholarly journals Short-term balance training and acute effects on postural sway in balance-deficient older adults: a randomized controlled trial

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Niklas Sörlén ◽  
Andreas Hult ◽  
Peter Nordström ◽  
Anna Nordström ◽  
Jonas Johansson
Keyword(s):  
Older Adults ◽  
Postural Sway ◽  
Intervention Group ◽  
Community Dwelling ◽  
Control Group ◽  
Positive Effects ◽  
Randomized Controlled ◽  
Eyes Closed ◽  
Balance Exercise

Abstract Background We aimed to determine the effectiveness of 4 weeks of balance exercise compared with no intervention on objectively measured postural sway. Methods This was a single-center parallel randomized controlled, open label, trial. A six-sided dice was used for allocation at a 1:1-ratio between exercise and control. The trial was performed at a university hospital clinic in Sweden and recruited community-dwelling older adults with documented postural instability. The intervention consisted of progressively challenging balance exercise three times per week, during 4 weeks, with follow-up at week five. Main outcome measures were objective postural sway length during eyes open and eyes closed conditions. Results Sixty-five participants aged 70 years (balance exercise n = 32; no intervention n = 33) were randomized. 14 participants were excluded from analysis because of early dropout before follow-up at week five, leaving 51 (n = 22; n = 29) participants for analysis. No significant differences were detected between the groups in any of the postural sway outcomes. Within-group analyses showed significant improvements in hand grip strength for the intervention group, while Timed Up & Go improvements were comparable between groups but only statistically significant in the control group. Conclusions Performing balance exercise over a four-week intervention period did not acutely improve postural sway in balance-deficient older adults. The lower limit in duration and frequency to achieve positive effects remains unclear. Trial registration Clinical trials NCT03227666, July 24, 2017, retrospectively registered.

scholarly journals Posturography with head movements in the assessment of balance in chronic unilateral vestibular lesions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Magdalena Janc ◽  
Mariola Sliwinska-Kowalska ◽  
Piotr Politanski ◽  
Marek Kaminski ◽  
Magdalena Jozefowicz-Korczynska ◽  
...  
Keyword(s):  
High Reliability ◽  
Low Frequency ◽  
Random Order ◽  
Head Movements ◽  
Canal Paresis ◽  
Eyes Closed ◽  
Static Posturography ◽  
Unstable Surface ◽  
Novel Method ◽  
The One

AbstractThe aim of our study was to validate the method of head-shake static posturography (HS-posturography) in healthy individuals and to establish the value of this novel method in the diagnostics of patients with unilateral vestibular lesion (UV). The study included 202 participants divided into two groups, one consisting of 133 patients with canal paresis CP > 19% and one of 69 healthy subjects. Participant was tested according to the standard protocol of static posturography (SP), and with head movements of 0.3 Hz (HS 40), 0.6 Hz (HS 70) in random order controlled by a metronome. HS-posturography revealed a similar repeatability and internal consistency as the standard posturography. In patients with UV, 4th condition revealed higher sensitivity (74%) and specificity (71%) in HS 40 than in the standard posturography (67%, 65% respectively) and HS 70 (54%, 70% respectively). Static posturography and HS- posturography revealed a high reliability of the testing method. The head movements added to static posturography improve the sensitivity and specificity of the method in group with vestibular impairment. The most important test for that purpose seems to be the one on unstable surface with the eyes closed, with low frequency of head movements.

scholarly journals Effects of a novel method of acute tryptophan depletion on plasma tryptophan and cognitive performance in healthy volunteers

2004 ◽  
Vol 178 (1) ◽  
pp. 92-99 ◽  
Author(s):  
E. A. T. Evers ◽  
D. E. Tillie ◽  
F. M. van der Veen ◽  
C. K. Lieben ◽  
J. Jolles ◽  
...  
Keyword(s):  
Healthy Volunteers ◽  
Cognitive Performance ◽  
Acute Tryptophan Depletion ◽  
Tryptophan Depletion ◽  
Plasma Tryptophan ◽  
Novel Method

scholarly journals Altering Visual Feedback Conditions Impacts Postural Sway Performance in Children After Controlling for Body Mass Index and Habitual Physical Activity

2017 ◽  
Vol 5 (2) ◽  
pp. 267-279 ◽  
Author(s):  
Michael Duncan ◽  
Elizabeth Bryant ◽  
Mike Price ◽  
Samuel Oxford ◽  
Emma Eyre ◽  
...  
Keyword(s):  
Physical Activity ◽  
Body Mass Index ◽  
Body Mass ◽  
Visual Feedback ◽  
Postural Sway ◽  
Habitual Physical Activity ◽  
Eyes Closed ◽  
Computerized Posturography ◽  
Eyes Open ◽  
Anterior Posterior

This study examined postural sway in children in eyes open (EO) and eyes closed (EC) conditions, controlling for body mass index (BMI) and physical activity (PA). Sixty two children (aged 8–11years) underwent sway assessment using computerized posturography from which 95% ellipse sway area, anterior/posterior (AP) sway, medial/lateral (ML) sway displacement and sway velocity were assessed. Six trials were performed alternatively in EO and EC. BMI (kg/m2) was determined from height and mass. PA was determined using sealed pedometry. AP amplitude (p = .038), ML amplitude (p = .001), 95% ellipse (p = .0001), and sway velocity (p = .012) were higher in EC compared with EO conditions. BMI and PA were not significant as covariates. None of the sway variables were significantly related to PA. However, sway velocity during EO (p = .0001) and EC (p = .0001) was significantly related to BMI. These results indicate that sway is poorer when vision is removed, that BMI influences sway velocity, but that pedometer-assessed PA was not associated with postural sway.

Structure-Borne Sound Characterization of Coupled Structures—Part II: Feasibility Study

2010 ◽  
Vol 132 (4) ◽  
Author(s):  
Goran Pavić ◽  
Andrew S. Elliott
Keyword(s):  
Feasibility Study ◽  
Small Error ◽  
Point Of View ◽  
Virtual Experiment ◽  
Vibration Source ◽  
Benchmark Test ◽  
Novel Method ◽  
Coupled Structures ◽  
Principal Method

A novel method has been outlined in the first part of this paper aimed at characterization of structure-borne sound transmission from a vibration source coupled via resilient mounts to a receiver. It can deliver the source mobility and its free velocity, together with the mobility of the receiver to which the source is connected, without decoupling the two structures. The only condition which has to be fulfilled is the conservation of coupling forces and moments across the mounts. In this part of the paper the method is examined from the feasibility point of view. A benchmark test is used as a validation reference for the method, where the properties of the resilient mounts are required and are assumed as known but not completely certain. The feasibility of the principal method is tested by virtual experiment involving two built-up plates resiliently connected at several points. The comparison of the benchmark and the principal method is used to illustrate the benefits of the latter given a small error in the supposedly known mount properties.

scholarly journals Influence of gender and physical exercise on balance of healthy young adults

2014 ◽  
Vol 27 (3) ◽  
pp. 399-406 ◽  
Author(s):  
Sarina Francescato Torres ◽  
Júlia Guimarães Reis ◽  
Daniela Cristina Carvalho de Abreu
Keyword(s):  
Physical Activity ◽  
Energy Expenditure ◽  
Postural Control ◽  
Postural Sway ◽  
Short Form ◽  
Quiet Standing ◽  
Moderate Activity ◽  
Men And Women ◽  
Eyes Closed ◽  
Sedentary Women

Objective To verify the effects of gender and physical activity on postural sway. Method A cross-sectional study was conducted to analyze upright balance of young men and women between the ages of 20-30, both active and sedentary. Study participants were 60 individuals, who were divided into: active women (n = 15), sedentary women (n = 15), active men (n = 15) and sedentary men (n = 15). The International Physical Activity Questionnaire (IPAQ) short form, was used to evaluate each participant’s level of physical activity. According to the questionnaire, active individuals are those who carry out moderate activity, with an energy expenditure between 3.5 and 6 METs (1 MET: 3.5 ml/kg/min), or vigorous activity, with an energy expenditure above 6 METs, at least three days a week for 20 minutes. To assess control of postural sway, we measured the amplitude and velocity of anteroposterior (AP) and mediolateral (ML) sway in standing position, with their eyes open and closed, with and without foam, on a force platform. Results Comparison between genders revealed that, when compared to sedentary women, sedentary men displayed poorer performance in velocity and amplitude of AP postural control sway with their eyes closed, with and without foam. There were no differences in the amplitude and velocity of ML sway, both with open and closed eyes among groups (p < 0.05). There were no differences when comparing physically active men and women either. Conclusion Sedentary men seem to rely more on vision for maintaining postural control in quiet standing situations with respect to women.

Controlling Human Upright Posture: Velocity Information Is More Accurate Than Position or Acceleration

2004 ◽  
Vol 92 (4) ◽  
pp. 2368-2379 ◽  
Author(s):  
John Jeka ◽  
Tim Kiemel ◽  
Robert Creath ◽  
Fay Horak ◽  
Robert Peterka
Keyword(s):  
Postural Sway ◽  
Sensory Information ◽  
Accurate Information ◽  
Support Surface ◽  
Quiet Stance ◽  
Eyes Closed ◽  
Stance Control ◽  
Model Predictions ◽  
Velocity Information ◽  
Multisensory Information

The problem of how the nervous system fuses sensory information from multiple modalities for upright stance control remains largely unsolved. It is well established that the visual, vestibular, and somatosensory modalities provide position and rate (e.g., velocity, acceleration) information for estimation of body dynamics. However, it is unknown whether any particular property dominates when multisensory information is fused. Our recent stochastic analysis of postural sway during quiet stance suggested that sensory input provides more accurate information about the body's velocity than its position or acceleration. Here we tested this prediction by degrading major sources of velocity information through removal/attenuation of sensory information from vision and proprioception. Experimental measures of postural sway were compared with model predictions to determine whether sway behavior was indicative of a deficit in velocity information rather than position or acceleration information. Subjects stood with eyes closed on a support surface that was 1) fixed, 2) foam, or 3) sway-referenced. Six measures characterizing the stochastic structure of postural sway behaved in a manner consistent with model predictions of degraded velocity information. Results were inconsistent with the effect of degrading only position or acceleration information. These findings support the hypothesis that velocity information is the most accurate form of sensory information used to stabilize posture during quiet stance. Our results are consistent with the assumption that changes in sway behavior resulting from commonly used experimental manipulations (e.g., foam, sway-referencing, eyes closed) are primarily attributed to loss of accurate velocity information.

Reliability of Force-Platform Measures of Postural Sway and Expertise-Related Differences

2011 ◽  
Vol 20 (4) ◽  
pp. 442-456 ◽  
Author(s):  
Zohreh Meshkati ◽  
Mehdi Namazizadeh ◽  
Mahyar Salavati ◽  
Masood Mazaheri
Keyword(s):  
Outcome Measures ◽  
Postural Sway ◽  
Center Of Pressure ◽  
Intraclass Correlation ◽  
Specific Property ◽  
Force Platform ◽  
Quiet Standing ◽  
Eyes Closed ◽  
Before And After ◽  
Eyes Open

Context:Although reliability is a population-specific property, few studies have investigated the measurement error associated with force-platform parameters in athletic populations.Objective:To investigate the skill-related differences between athletes and nonathletes in reliability of center-of-pressure (COP) summary measures under eyes-open (EO) and eyes-closed (EC) conditions.Design:Test–retest reliability study.Setting:COP was recorded during double-leg quiet standing on a Kistler force platform before and after a fatiguing treadmill exercise, with EO and EC.Participants:31 male participants including 15 athletes practiced in karate and 16 nonathletes.Main Outcome Measures:Standard deviation (SD) of amplitude, phase-plane portrait, SD of velocity, mean total velocity, and area were calculated from 30-s COP data. Intraclass correlation coefficient (ICC), standard error of measurement, and coefficient of variation (CV) were used as estimates of reliability and precision.Results:Higher ICCs were found for COP measures in the athlete (compared with the nonathlete) group, postfatigued (compared with prefatigued) condition, and EC (compared with EO) tests. CVs smaller than 15% were obtained for most of the COP measures. SD of velocity in the anteroposterior direction showed the highest reliability in most conditions.Conclusions:Tests with EC and to a lesser extent tests performed in the athlete group and in the postfatigued condition showed better reliability.

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