Bimanual isometric force control: Asymmetry and coordination evidence post stroke

Lodha, Neha; Coombes, Stephen; Cauraugh, James H.

doi:10.1016/j.clinph.2011.08.014

Cited by 61 publications

(71 citation statements)

References 59 publications

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“…Although various motor abilities are required in steady force production tasks, the motor control deficits after stroke have been typically captured through a few indexes such as the steadiness of the finger force (Kurillo et al 2004;Lodha et al 2010Lodha et al , 2012Naik et al 2011;Lindberg et al 2012;Chang et al 2013). Other motor abilities such as accuracy, reproducibility, flexibility, or multiformity are not well understood in the stroke population, although one previous study reported that stroke survivors retained multiformity in reaching tasks (Reisman and Scholz 2003) while still showing deficits in reproducibility (Reisman and Scholz 2006).…”

Section: Introductionmentioning

confidence: 98%

“…To assess these motor abilities, various submaximal force-matching tasks and computational methods have been developed (Lodha et al 2010(Lodha et al , 2012Naik et al 2011;Lindberg et al 2012;Kang and Cauraugh 2014). Recently, a hierarchical variability decomposition (HVD) model was developed for the purpose of quantifying specific motor abilities that contribute to the motor behaviors of a redundant motor system (Koh et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Deficits in motor abilities for multi-finger force control in hemiparetic stroke survivors

Kim

Koh

et al. 2016

Exp Brain Res

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The ability to control redundant motor effectors is one of hallmarks in human motor control, and the topic has been studied extensively over several decades since the initial inquiries proposed by Nicholi Bernstein. However, our understanding of the influence of stroke on the control of redundant motor systems is very limited. This study aimed to investigate the effect of stroke-related constraints on multi-finger force control abilities in a visuomotor task. Impaired (IH) and less-impaired hands (LH) of 19 hemiparetic stroke survivors and 19 age-matched control subjects were examined. Each hand repeatedly produced isometric forces to match a target force of 5 N shown on a computer screen using all four fingers. The hierarchical variability decomposition (HVD) model was used to separate force-matching errors (motor performance) into task-relevant measures (accuracy, steadiness, and reproducibility). Task-irrelevant sources of variability in individual finger force profiles within and between trials (flexibility and multiformity) were also quantified. The IH in the stroke survivors showed deficits in motor performance attributed mainly to lower accuracy and reproducibility as compared to control hands (p < 0.05). The LH in stroke survivors showed lower reproducibility and both hands in stroke also had higher multiformity than the control hands (p < 0.05). The findings from our HVD model suggest that accuracy, reproducibility, and multiformity were mainly impaired during force-matching task in the stroke survivors. The specific motor deficits identified through the HVD model with the new conceptual framework may be considered as critical factors for scientific investigation on stroke and evidence-based rehabilitation of this population.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Deficits in motor abilities for multi-finger force control in hemiparetic stroke survivors

Kim

Koh

et al. 2016

Exp Brain Res

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“…A recent research focus involving force control provides an ideal avenue for continuous time references between action goals and motor output from both limbs together as well as each limb separately [11,23]. Thus, bimanual force control capabilities may clinically demonstrate neuromuscular functions of stroke individuals that would otherwise not be available [2,6,22,25].…”

Section: Introductionmentioning

confidence: 99%

Bimanual force variability in chronic stroke: With and without visual information

Kang

Cauraugh

2015

Neuroscience Letters

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“…The affected side of the upper and lower extremities interferes with both unilateral and bilateral movements [1,2]. Typically, an inability to generate and modulate force production in paretic limbs causes movement control impairments such as compromised motor coordination, excessive movement variability, and motor dysfunctions evaluated by clinical assessments [3][4][5]. After experiencing a stroke, patients frequently show less magnitude of force production when executing actions on their paretic limb in comparison to their non-paretic limbs [6,7].…”

Section: Introductionmentioning

confidence: 99%

Non-Invasive Brain Stimulation Improves Paretic Limb Force Production: A Systematic Review and Meta-Analysis

2016

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Bimanual isometric force control: Asymmetry and coordination evidence post stroke

Cited by 61 publications

References 59 publications

Deficits in motor abilities for multi-finger force control in hemiparetic stroke survivors

Deficits in motor abilities for multi-finger force control in hemiparetic stroke survivors

Bimanual force variability in chronic stroke: With and without visual information

Non-Invasive Brain Stimulation Improves Paretic Limb Force Production: A Systematic Review and Meta-Analysis

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