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Cognitive-motor interference during goal-directed upper-limb movements.

Paulina J M Bank1, Johan Marinus1, Rosanne M van Tol2

  • 1Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands.

The European Journal of Neuroscience
|September 26, 2018
PubMed
Summary
This summary is machine-generated.

Cognitive-motor interference (CMI) during upper-limb tasks differs between healthy individuals, Parkinson's disease, and stroke patients. Neurological conditions impact attention allocation and motor control differently.

Keywords:
Parkinson's diseaseattentioncognitive-motor interferencedual-taskstroke

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Area of Science:

  • Neuroscience
  • Motor Control
  • Cognitive Psychology

Background:

  • Cognitive dual-task effects on highly automated motor tasks like walking are well-studied.
  • Limited research exists on dual-task effects impacting upper-limb motor control.
  • Cognitive-motor interference (CMI) is crucial for daily functioning but under-researched in upper-limb tasks.

Purpose of the Study:

  • To develop and validate a protocol for assessing CMI in upper-limb motor control.
  • To investigate dual-task effects on upper-limb motor control in healthy individuals and patients with Parkinson's disease (PD) and stroke.
  • To explore patterns of CMI to understand attentional capacity and allocation in neurological disorders.

Main Methods:

  • Developed a novel protocol to assess CMI during upper-limb motor control.
  • Evaluated 57 healthy individuals, 57 PD patients, and 57 stroke patients.
  • Measured cognitive and motor performance under single- and dual-task conditions.

Main Results:

  • Healthy individuals showed CMI primarily under challenging motor conditions.
  • PD patients exhibited greater CMI, likely due to reduced attentional capacity and increased cognitive load in motor control.
  • Stroke patients did not show a general CMI increase, but severe motor dysfunction correlated with CMI.
  • CMI patterns varied based on diagnosis and symptom severity, differing from clinical ratings.

Conclusions:

  • CMI during upper-limb tasks is differentially affected by Parkinson's disease and stroke.
  • Attentional capacity and allocation are key factors influencing CMI in neurological populations.
  • CMI may represent a distinct construct from traditional clinical assessments and warrants further investigation for its role in daily activities.