Biomechanical assessment of quiet standing and changes associated with aging

Panzer, Victoria; Bandinelli, Stefania; Hallett, Mark

doi:10.1016/s0003-9993(95)80024-7

Cited by 186 publications

(128 citation statements)

References 24 publications

Supporting

Mentioning

106

Contrasting

Unclassified

Order By: Relevance

“…Psychological factors, for example, such as fear of falling or fall anxiety, have been found to be associated with tighter postural control strategies, as reported by reduced peak-to-peak sway and increased mean frequency of COM sway (28,29). Moreover, in some other studies, elderly people and people with Parkinson's disease displayed reduced (30,31) center of pressure, indicating that larger COM sway may not always be related to poor balance. Thus, it might be reasonable to assume that possible fall anxiety differences between men and women may cause women to choose more conscious and preventive postural control strategies than men.…”

Section: Discussionmentioning

confidence: 97%

Influence of Leg Dominance on Single-Leg Stance Performance During Dynamic Conditions: An Investigation into the Validity of Symmetry Hypothesis for Dynamic Postural Control in Healthy Individuals

Cuğ¹,

Ozdemir²,

Ak³

2014

Turk J Phys Med Rehab

View full text Add to dashboard Cite

Objective: The primary purpose of the present study was to examine differences in balance performance between the dominant and nondominant legs during dynamic balance tasks in healthy individuals with no regular exercise backgrounds. As a secondary purpose, gender differences in single-leg stance were also investigated. Material and Methods: Twenty-one men and 24 women participated in this study. Single-leg balance performance was evaluated by the Biodex Stability System SD. All subjects were tested at level 1 for 20 sec, and 1-minute rest intervals were provided among 6 trials for each leg. Results: According to the results, there was no multivariate effect of leg dominance on any stability index, indicating symmetry between limbs in terms of balance performance. Mean comparisons showed that women had significantly better balance scores than men on overall (p<0.05), antero-posterior (p<0.05), and medio-lateral (p<0.05) stability indexes. Conclusion: Functional symmetry exists between the dominant and nondominant leg in all stability indexes of balance performance of sedentary individuals. Female subjects swayed less than males on both the dominant and the nondominant leg measurements in all directions (overall, antero-posterior, and medio-lateral directions).

show abstract

Section: Discussionmentioning

confidence: 97%

Influence of Leg Dominance on Single-Leg Stance Performance During Dynamic Conditions: An Investigation into the Validity of Symmetry Hypothesis for Dynamic Postural Control in Healthy Individuals

Cuğ¹,

Ozdemir²,

Ak³

2014

Turk J Phys Med Rehab

View full text Add to dashboard Cite

show abstract

“…The center of pressure (COP) variable has often been used to measure postural control. However, higher COP parameters, such as length, area, displacement, or velocity, are not necessarily indicative of a risk of falling (11). COP movements may successfully stabilize the center of mass (COM) by maintaining the COM over the base of support and thereby reducing the risk of falling (12).…”

mentioning

confidence: 99%

“…COP movements may successfully stabilize the center of mass (COM) by maintaining the COM over the base of support and thereby reducing the risk of falling (12). To overcome these limitations, it has been suggested that the combined interpretation of COP and COM displacements provides better insight into the assessment of balance than COP and COM taken separately (11,(13)(14)(15). Thus, a new biomechanical variable (COP-COM), which represents the scalar distance at a given time between the COP and COM (13), has been proposed.…”

mentioning

confidence: 99%

Evaluation of postural stability in elderly with diabetic neuropathy.

Corriveau

François²,

Hébert³

et al. 2000

Diabetes Care

142

View full text Add to dashboard Cite

OBJECTIVE -The objective of this study was to compare clinical and biomechanical characteristics of balance in diabetic polyneuropathic elderly patients and normal agematched subjects.RESEARCH DESIGN AND METHODS -Fifteen elderly with distal neuropathy (DNP) and 15 healthy age-matched subjects were evaluated with the biomechanical variable COP-COM, which represents the distance between the center of pressure (COP) and the center of mass (COM). Measurements were taken in the quiet position with a double-leg stance, in eyes-open (EO) and eyes-closed (EC) conditions. Subjects were also assessed with clinical balance evaluations.RESULTS -The COP-COM variable was statistically significantly larger in the DNP group than in the healthy group in anterior-posterior (A/P) and medial-lateral (M/L) directions. Furthermore, the DNP group showed statistically significantly larger amplitudes of the COP-COM variable without vision. The severity of the neuropathy, as quantified using the Valk scoring system, was correlated with COP-COM amplitude in both directions.CONCLUSIONS -Evaluation of the postural stability of an elderly diabetic population using the COP-COM variable can detect a very small change in postural stability and could be helpful in identifying elderly with DNP at risk of falling.

show abstract

“…In order to maintain equilibrium, the central nervous system (CNS) needs to continuously monitor and interpret information from the visual, vestibular and proprioceptive systems [1]. Inadequacy in postural balance in older people increases the risk of falls, which are the leading cause of accidental death and injury [2]. Inadequacy of visual function with age is one of the key risk factor for falls in the elderly [3].…”

Section: Introductionmentioning

confidence: 99%

Postural time-series analysis using Empirical Mode Decomposition and second-order difference plots

Pachori

Hewson

Snoussi

et al. 2009

2009 IEEE International Conference on Acoustics, Speech and Signal Processing

View full text Add to dashboard Cite

This paper presents a new method for analysis of center of pressure (COP) signals using Empirical Mode Decomposition (EMD). The EMD decomposes a COP signal into a finite set of band-limited signals termed as intrinsic mode functions (IMFs). Thereafter, a signal processing technique used in continuous chaotic modeling is used to investigate the difference between experimental conditions on the summed IMFs. This method is used to detect the degree of variability from a second-order difference plot, which is quantified using a Central Tendency Measure (CTM). Seventeen subjects were tested under eyes open (EO) and eyes closed (EC) conditions, with different vibration frequencies applied for the EC condition in order to provide additional sensory perturbation. This study has demonstrated an effective way to differentiate vibration frequencies by combining EMD and second-order difference (SOD) plots.

show abstract

Biomechanical assessment of quiet standing and changes associated with aging

Cited by 186 publications

References 24 publications

Influence of Leg Dominance on Single-Leg Stance Performance During Dynamic Conditions: An Investigation into the Validity of Symmetry Hypothesis for Dynamic Postural Control in Healthy Individuals

Influence of Leg Dominance on Single-Leg Stance Performance During Dynamic Conditions: An Investigation into the Validity of Symmetry Hypothesis for Dynamic Postural Control in Healthy Individuals

Evaluation of postural stability in elderly with diabetic neuropathy.

Postural time-series analysis using Empirical Mode Decomposition and second-order difference plots

Contact Info

Product

Resources

About