Postural control differs between those with and without chronic ankle instability

Wikstrom, Erik A.; Fournier, Kimberly A.; McKeon, Patrick O.

doi:10.1016/j.gaitpost.2010.03.015

Cited by 156 publications

(124 citation statements)

References 32 publications

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“…The COP speed has been able to discriminate between subjects with functional ankle instability and healthy controls [15]. Moreover, COP speed was significantly larger for subjects with chronic ankle instability, than for copers and healthy controls [22]. Surprisingly, however, TTS and DPSI based on jump landing tests appeared to be uncorrelated with these COP derivatives of static single leg stance [8,23,24].…”

Section: Introductionmentioning

confidence: 94%

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Time series of ground reaction forces following a single leg drop jump landing in elite youth soccer players consist of four distinct phases

et al. 2016

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A B S T R A C TThe single leg drop jump landing test may assess dynamic and static balance abilities in different phases of the landing. However objective definitions of different phases following landing and associated reliability are lacking.Therefore, we determined the existence of possible distinct phases of single leg drop jump landing on a force plate in 82 elite youth soccer players. Three outcome measures were calculated over moving windows of five sizes: center of pressure (COP) speed, COP sway and horizontal ground reaction force (GRF).Per outcome measure, a Factor Analysis was employed with all windows as input variables. It showed that four factors (patterns of variance) largely (>75%) explained the variance across subjects/trials along the 12 s time series. Each factor was highly associated with a distinct phase of the time series signal: dynamic (0.4-2.7 s), late dynamic (2.5-5.0 s), static 1 (5.0-8.3 s) and static 2 (8.1-11.7 s).Intra-class correlations (ICC) between trials were lower for the dynamic phases (0.45-0.68) than for the static phases (0.60-0.86). The COP speed showed higher ICC's (0.63-0.86) than COP sway (0.45-0.61) and GRF (0.57-0.71) for all four phases.In conclusion, following a drop jump landing unique information is available in four distinct phases. The COP speed is most reliable, with higher reliability in the static phases compared to the dynamic phases. Future studies should assess the sensitivity of information from dynamic, late dynamic and static phases.

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Section: Introductionmentioning

confidence: 94%

“…Center of pressure (COP) derivatives, such as 'COP speed' and 'COP sway', have been shown to be highly reliable and valid in single leg balance performance [15,21,22]. The COP speed has been able to discriminate between subjects with functional ankle instability and healthy controls [15].…”

Section: Introductionmentioning

confidence: 99%

Time series of ground reaction forces following a single leg drop jump landing in elite youth soccer players consist of four distinct phases

et al. 2016

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“…Recent experimental studies have shown that postural sway analysis can be used to quantify changes in body or neural control due to pathologies [3], traumas [4] or ageing [29]. Complementing such data with mathematical models like the one we have proposed can help to devise tests with better discrimination while possibly uncovering the reason for performance degradation with age.…”

Section: Resultsmentioning

confidence: 99%

“…Indeed, a stable upright stance can only be achieved by exploiting a feedback mechanism that creates a corrective torque based on multiple sensory inputs associated with body swaying [1]. In addition to its intrinsic neuromechanical importance, understanding the mechanisms involved with balance may help in the design of biped robots [2], in the diagnosis and amelioration of motor control problems in a range of neurological ailments [3,4], as well as in analysing games, such as stick-balancing [5] and even possibly in the active stabilization of large structures, such as buildings [6].…”

Section: Introductionmentioning

confidence: 99%

Balancing on tightropes and slacklines

Paoletti

Mahadevan

2012

J. R. Soc. Interface.

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Balancing on a tightrope or a slackline is an example of a neuromechanical task where the whole body both drives and responds to the dynamics of the external environment, often on multiple timescales. Motivated by a range of neurophysiological observations, here we formulate a minimal model for this system and use optimal control theory to design a strategy for maintaining an upright position. Our analysis of the open and closed-loop dynamics shows the existence of an optimal rope sag where balancing requires minimal effort, consistent with qualitative observations and suggestive of strategies for optimizing balancing performance while standing and walking. Our consideration of the effects of nonlinearities, potential parameter coupling and delays on the overall performance shows that although these factors change the results quantitatively, the existence of an optimal strategy persists.

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“…Bislang besteht jedoch kein Konsens bez. der Messverfahren mit dem höchsten diagnostischen Wert zur Identifikation von Defiziten der Haltungskontrolle [25,28,29]. …”

Section: Propriozeptionunclassified

Beeinträchtigungen der sensomotorischen Kontrolle bei funktioneller Sprunggelenkinstabilität

Steib

Pfeifer

2015

Z Orthop Unfall

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!Lateral ankle sprains are among the most common sports injuries, with a prevalence of 25 to 30 % of all injuries. At least one-third of individuals develop long-term complaints and chronic instabilities at the ankle, which in many cases cannot be attributed to mechanical insufficiencies of the joint. This condition is referred to as functional ankle instability (FAI). Impairments of the sensorimotor control system, such as disturbed proprioception and postural control, as well as reduced muscle strength and reflex activity, have been suggested to contribute to the aetiology of FAI. This review summarises the current body of literature regarding sensorimotor control in individuals with FAI. We discuss the results in the context of current neurophysiological models of the development of functional joint instabilities.

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Postural control differs between those with and without chronic ankle instability

Cited by 156 publications

References 32 publications

Time series of ground reaction forces following a single leg drop jump landing in elite youth soccer players consist of four distinct phases

Time series of ground reaction forces following a single leg drop jump landing in elite youth soccer players consist of four distinct phases

Balancing on tightropes and slacklines

Beeinträchtigungen der sensomotorischen Kontrolle bei funktioneller Sprunggelenkinstabilität

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