The interaction of postural and voluntary strategies for stability in Parkinson's disease

Lima‐Pardini, Andrea Cristina de; Papegaaij, Selma; Cohen, Rajal G.; Teixeira, Luís Augusto; Smith, Beth A.; Horak, Fay B.

doi:10.1152/jn.00118.2012

Cited by 26 publications

(21 citation statements)

References 54 publications

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“…The data from these participants was also used for another study, where they were compared with Parkinson patients (de Lima-Pardini et al 2012). The participants were age-matched to these Parkinson patients.…”

Section: Methodsmentioning

confidence: 99%

Keeping your balance while balancing a cylinder: interaction between postural and voluntary goals

et al. 2012

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The present study investigated whether postural responses are influenced by the stability constraint of a voluntary, manual task. We also examined how task constraint and first experience (the condition with which the participants started the experiment) influence the kinematic strategies used to simultaneously accomplish a postural response and a voluntary task. Twelve healthy older adults were perturbed during standing, while holding a tray with a cylinder placed with the flat side down (low constraint; LC) or with the rolling, round side down (high constraint; HC). Central set changed according to the task constraint, as shown by a higher magnitude of both the gastrocnemius (GAS) and tibialis anterior (TA) muscle activation bursts in the HC than the LC condition. This increase in muscle activation was not reflected, however, in changes in the center of pressure or center of mass displacement. Task constraint influenced the peak shoulder flexion for the voluntary tray task but not the peak hip flexion for the postural task. In contrast, first experience influenced the peak hip flexion but not the peak shoulder flexion. These results suggest an interaction between two separate control mechanisms for automatic postural responses and voluntary stabilization tasks.

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Section: Methodsmentioning

confidence: 99%

Keeping your balance while balancing a cylinder: interaction between postural and voluntary goals

et al. 2012

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“…People with PD, however, took several trials before exhibiting the appropriate postural response to the new perturbations. This represents a relative "inflexibility" to alter postural responses to match changes in task conditions or contexts (24). However, despite potentially slowed rates of adaptation and learning, people with PD can eventually adapt gait and stepping patterns with repetition (11,56,90,118).…”

Section: Poor Postural Controlmentioning

confidence: 99%

Neural Control of Walking in People with Parkinsonism

2016

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People with Parkinson's disease exhibit debilitating gait impairments, including gait slowness, increased step variability, and poor postural control. A widespread supraspinal locomotor network including the cortex, cerebellum, basal ganglia, and brain stem contributes to the control of human locomotion, and altered activity of these structures underlies gait dysfunction due to Parkinson's disease.

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“…Quantitative posturography allows a more objective assessment of postural stability, and there is an extensive literature on its use in IPD to assess falls risk, as a comparator for other balance assessments, such as the pull‐test, and to assess postural responses during voluntary tasks, and the effect of disease asymmetries on postural control . Quantitative posturography has also been used to evaluate the effect of therapeutic interventions, such as balance training and exercise, deep brain stimulation, and pharmacotherapy, on postural control.…”

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confidence: 99%

Clinical and posturographic correlates of falling in Parkinson's disease

et al. 2013

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Various clinical tests and balance scales have been used to assess postural stability and the risk of falling in patients with idiopathic Parkinson's disease (IPD). Quantitative posturography allows a more objective assessment but the findings in previous studies have been inconsistent and few studies have investigated which posturographic measures correlate best with a history of falling. The purpose of this study was to determine the efficacy of clinical tests, balance scales, and stable-platform posturography in detecting postural instability and discriminating between fallers and non-fallers in a home-dwelling PD cohort. Forty-eight PD subjects (Hoehn & Yahr stage 1-3) and 17 age-matched controls had the following assessments: Activities-specific Balance Confidence scale, Berg Balance Scale, Unified Parkinson's Disease Rating Scale (UPDRS) (motor), pull-test, timed up-and-go, static posturography, and dynamic posturography to assess multidirectional leaning balance. Of the clinical assessments, all but the pull-test were closely correlated with a history of falling. Static posturography discriminated between PD fallers and controls but not between PD fallers and non-fallers, whereas dynamic posturography (reaction time, velocity, and target hit-time) also discriminated between fallers and non-fallers. Our findings suggest that this combination of clinical and posturographic measures would be useful in the prospective assessment of falls risk in PD patients. A further prospective study is now required to assess their predictive value. © 2013 Movement Disorder Society.

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The interaction of postural and voluntary strategies for stability in Parkinson's disease

Cited by 26 publications

References 54 publications

Keeping your balance while balancing a cylinder: interaction between postural and voluntary goals

Keeping your balance while balancing a cylinder: interaction between postural and voluntary goals

Neural Control of Walking in People with Parkinsonism

Clinical and posturographic correlates of falling in Parkinson's disease

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