Non-linear dynamical features of center of pressure extracted by recurrence quantification analysis in people with unilateral anterior cruciate ligament injury

Negahban, Hossein; Salavati, Mahyar; Mazaheri, Masood; Sanjari, Mohammad Ali; Hadian, Mohammad Reza; Parnianpour, Mohamad

doi:10.1016/j.gaitpost.2010.01.020

Cited by 41 publications

(35 citation statements)

References 25 publications

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“…Our results are consistent with other studies which found that an increase in the difficulty of the stability task entails an increase of the postural sway amplitude (Lamoth, van Lummel, & Beek, 2009;Negahban et al, 2010;Stins, Ledebt, Emck, van Dokkum, & Beek, 2009;Stins, Michielsen, Roerdink, & Beek, 2009).…”

Section: Stability and Complexity Of Angular Displacement Of Cog And supporting

confidence: 93%

“…These results are similar to those obtained in previous studies in the ML axis (Negahban et al, 2010;Stins, Michielsen et al, 2009) and in the AP axis (Lamoth et al, 2009;Negahban et al, 2010;Stins, Michielsen et al, 2009), in which participants showed a higher complexity postural sway in quiet standing on rigid support as opposed to foam support. Especially significant were the results in the correlation analyses.…”

Section: Stability and Complexity Of Angular Displacement Of Cog And supporting

confidence: 91%

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Effect of increasing difficulty in standing balance tasks with visual feedback on postural sway and EMG: Complexity and performance

Barbado

Solana

Vera-García

et al. 2012

Human Movement Science

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Section: Stability and Complexity Of Angular Displacement Of Cog And supporting

confidence: 93%

Section: Stability and Complexity Of Angular Displacement Of Cog And supporting

confidence: 91%

Effect of increasing difficulty in standing balance tasks with visual feedback on postural sway and EMG: Complexity and performance

Barbado

Solana

Vera-García

et al. 2012

Human Movement Science

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“…More deterministic movements result in less flexibility of the neuromuscular system to adapt to perturbations. 28 Together, these studies indicated that a level of variability in movement was healthy and may be related to a greater ability to adapt to stress or perturbation from the environment. 12 …”

Section: Discussionmentioning

confidence: 90%

Altered postural sway persists after anterior cruciate ligament reconstruction and return to sport

Paterno¹,

Schmitt²,

Ford³

et al. 2013

Gait & Posture

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Postural sway is defined as the movement of a body’s center of mass within the base of support to maintain postural equilibrium. Deficits in postural sway are present after ACL injury; however, current evidence linking it to future injury risk is unclear. The purpose of this study was to determine if postural sway deficits persist after ACL reconstruction (ACLR). The hypothesis tested was that after ACLR, patients who return to sport (RTS) would demonstrate differences in postural sway compared to control (CTRL) subjects. Fifty-six subjects with unilateral ACLR released to RTS, and 42 uninjured CTRL subjects participated. Dynamic postural sway was assessed and 3-way (2×2×2) ANOVA was used to analyze the variables. A side X group X sex (p=0.044) interaction in postural sway was observed. A side X group analysis also revealed an interaction (p=0.04) however, no effect of sex was observed (p=0.23). Analysis within the ACLR cohort showed less (p=0.001) postural sway on the involved side (1.82 ± 0.84°) versus the uninvolved side (2.07 ± 0.96°). No side-to-side differences (p=0.73) were observed in the CTRL group. The involved limb of subjects after ACLR demonstrated the least postural sway. In conclusion, these findings indicate that dynamic postural sway may be significantly altered in a population of athletes after ACLR and RTS compared to CTRL subjects. Further investigation is needed to determine if deficits in postural sway can be used as an effective criterion to assist in the decision to safely RTS after ACLR.

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“…The results suggested that vision affects the deterministic structure of walking pattern. Neghaban et al [8] used RQA in understanding the postural sway in unilateral anterior cruciate ligament injury subjects. The result suggested that there is more regularity in double postural task than that of single postural task.…”

Section: Related Workmentioning

confidence: 99%

“…Laminarity describes the contribution of recurrence points to form vertical lines of length greater than vmin. Laminarity is calculated as in (8).…”

Section: ) Laminarity (Lam)mentioning

confidence: 99%

Recurrence Quantification Analysis of Human Gait in Neurological Movement Disorders

Prabhu¹,

Pradhan²

2016

IJERT

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Various gait stability measures have been proposed in the literature, with the aim of quantifying gait abnormalities and balance disorders in healthy and impaired subjects. In this study, the conjecture is that there might be some underlying complex temporal structure in the step to step variations, that is, it may be non-linear or fractal in character. Recurrence quantification analysis helps to know the dynamics of human gait and quantify its parameters in both healthy and pathological subjects. Thirteen subjects were considered to analyze the gait of subjects with neurological disorders (Amyotrophic Lateral sclerosis, Huntington and Parkinson) and thirteen healthy control subjects. The gait parameters are recorded over a duration of 300 seconds per subject using force sensitive resistors. These gait parameters are then used for recurrence quantification analysis by estimating time delay, embedding dimension and threshold. The eight parameters obtained from analysis are then used for classification using probabilistic neural networks. The accuracy deduced from classification associated with stride, swing and stance phase is 50%, 37.5% and 54.16% respectively.

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Non-linear dynamical features of center of pressure extracted by recurrence quantification analysis in people with unilateral anterior cruciate ligament injury

Cited by 41 publications

References 25 publications

Effect of increasing difficulty in standing balance tasks with visual feedback on postural sway and EMG: Complexity and performance

Effect of increasing difficulty in standing balance tasks with visual feedback on postural sway and EMG: Complexity and performance

Altered postural sway persists after anterior cruciate ligament reconstruction and return to sport

Recurrence Quantification Analysis of Human Gait in Neurological Movement Disorders

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