The assessment of body sway and the choice of the stability parameter(s)

Raymakers, J. A.; Samson, M; Verhaar, Harald J. J.

doi:10.1016/j.gaitpost.2003.11.006

Cited by 521 publications

(373 citation statements)

References 19 publications

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“…Although the general shape of this interaction was identical for different measures of COP displacements it reached statistical significance only in measures that considered the actual range of motion. This pattern of results replicates former findings [48] and might implicate that attentional resource competition in dual-tasking postural control also results in short-term lapses in postural control behavior. Additional analyses also showed that postural control was not more strongly affected by spatial processing than by verbal processing when task difficulty was taken into account.…”

Section: Summary Of Resultssupporting

confidence: 90%

“…Thus, it provides an accurate and complete estimate of the area spanned by the COP excursions [47]. It has been shown empirically that standardized COP-displacement measures such as the standard deviations of displacements are less sensitive to experimental manipulations than the actual range of motion [48]. However, this estimation technique is also more vulnerable to single rapid deviations during the trial period.…”

Section: Discussionmentioning

confidence: 99%

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Dual-tasking postural control: Aging and the effects of cognitive demand in conjunction with focus of attention

Huxhold

Schmiedek

et al. 2006

Brain Research Bulletin

515

379

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Postural control in everyday life is generally accompanied by posture-unrelated cognitive activity. Thus, mild forms of dual-tasking postural control are the norm rather than the exception. Based on this consideration and available evidence, we propose and empirically examined, in young and old adults, a non-monotonic, U-shaped relation between the efficacy of postural control and concurrent cognitive demands that reflect opposing trends of the effects of attention focus and attentional resource competition. When instructed to perform an easy cognitive task that presumably shifted the focus of attention away from posture control, the center of body pressure (COP) excursions decreased both in young and older adults relative to a single-task baseline where the focus of attention was explicitly directed towards the postural control task itself. However, when performing more demanding cognitive tasks, older adults showed increased COP displacements, in line with the predicted Ushape function, whereas young adults did not. We outline mechanisms linking postural control to cognitive demand and suggest routes for future investigation.

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Section: Summary Of Resultssupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Dual-tasking postural control: Aging and the effects of cognitive demand in conjunction with focus of attention

Huxhold

Schmiedek

et al. 2006

Brain Research Bulletin

515

379

View full text Add to dashboard Cite

show abstract

“…19 Center of pressure speed constitutes a good index of activity required to maintain stability 20,21 and has been often considered as a sensitive and discriminant variable of stability. 22,23 In addition, structural posturographic parameters were computed using a sway density plot approach. 23,24 This analysis allows to document the possible physiological processes underlying balance control that were modified as a result of weight loss.…”

Section: Data Analysesmentioning

confidence: 99%

Reducing weight increases postural stability in obese and morbid obese men

et al. 2006

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Objective: To investigate the effect of weight loss on balance control in obese and morbid obese men. Methods: In a longitudinal and clinical intervention study, postural stability was measured with a force platform before and after weight loss in men. Weight loss was obtained in obese men (mean body mass index (BMI) ¼ 33.0 kg/m 2 ) by hypocaloric diet until resistance and in morbid obese men (mean BMI ¼ 50.5 kg/m 2 ) by bariatric surgery. Morbid obese men were tested before surgery, and 3 and 12 months after surgery when they had lost 20 and nearly 50% of initial body weight, respectively. Normal weight individuals (mean BMI ¼ 22.7 kg/m 2 ) were tested twice within a 6-to 12-month period to serve as control. Body fatness and fat distribution measures, and posturographic parameters of the center of foot pressure (CP) along the antero-posterior and medio-lateral axes for conditions with and without vision were performed in all subjects. Results: Weight loss averaged 12.3 kg after dieting and 71.3 kg after surgery. Body weight remained unchanged in the control group. After weight loss, nearly all measures of postural stability were improved with and without vision (i.e., CP speed and range in antero-posterior and medio-lateral axes). A strong linear relationship was observed between weight loss and improvement in balance control measured from CP speed (adjusted R 2 ¼ 0.65, Po0.001). Conclusion: Weight loss improves balance control in obese men and the extent of the improvement is directly related to the amount of weight loss. This should decrease the habitual greater risk of falling observed in obese individuals.

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“…According to Kirshenbaum et al (2001) the range of COP is an indicator of the eVectiveness of the postural performance. The mean velocity of the COP was recently recognized as the most reliable COP postural parameter since only two trials are necessary to obtain a consistent measure of postural steadiness (Lafond et al 2004;Raymakers et al 2005). More importantly, the velocity of the COP reXects the control strategy used by the children.…”

Section: Apparatus and Postural Parametersmentioning

confidence: 99%

Postural control anomalies in children with Tourette syndrome

et al. 2007

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The goal of the present study was to determine whether postural control is aVected in Gilles-de-la-Tourette syndrome (TS). Center of pressure (COP) displacements were recorded in children with TS and unaVected siblings in three conditions using a force platform: (1) Eyes-Open, (2) Eyes-Closed, (3) One-Leg standing with eyes open. The COP range and velocity were higher in children with TS than in unaVected siblings in all conditions. These diVerences could not be attributed to age, present tic severity, comorbidities (hyperactivity and compulsions) or medication. The data suggest that sub-clinical postural control anomalies are present in TS.

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The assessment of body sway and the choice of the stability parameter(s)

Cited by 521 publications

References 19 publications

Dual-tasking postural control: Aging and the effects of cognitive demand in conjunction with focus of attention

Dual-tasking postural control: Aging and the effects of cognitive demand in conjunction with focus of attention

Reducing weight increases postural stability in obese and morbid obese men

Postural control anomalies in children with Tourette syndrome

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