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Variability in coordination patterns in children with developmental coordination disorder (DCD).

Laura Golenia1, Raoul M Bongers1, Jessika F van Hoorn2

  • 1University of Groningen, University Medical Center Groningen, Center for Human Movement Sciences, Sector F, FA23, P.O. Box 196, 9700 AD Groningen, The Netherlands.

Human Movement Science
|June 30, 2018
PubMed
Summary
This summary is machine-generated.

Children with Developmental Coordination Disorder (DCD) show more arm movement variability that doesn't impact performance. This suggests high motor variability in DCD may not always be detrimental.

Keywords:
Developmental Coordination DisorderDynamic Systems ApproachGoal-directed reachingMotor abundanceMotor variabilityUncontrolled manifold method

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Area of Science:

  • Motor Control
  • Developmental Psychology
  • Neuroscience

Background:

  • Developmental Coordination Disorder (DCD) is characterized by high motor variability.
  • The functional role of this motor variability in DCD requires further investigation.
  • Understanding coordination patterns is crucial as DCD is a coordination disorder.

Purpose of the Study:

  • To compare motor variability in coordination patterns between children with DCD and typically developing (TD) children.
  • To investigate how different types of variability (Vucm and Vort) relate to performance in a goal-directed reaching task.
  • To enhance the understanding of motor variability's role in DCD.

Main Methods:

  • Utilized the Uncontrolled Manifold (UCM) method to quantify motor variability.
  • Measured variability in arm coordination patterns during goal-directed reaching movements.
  • Compared two types of variability: Vucm (unaffected by fingertip position) and Vort (affecting fingertip position).

Main Results:

  • Children with DCD exhibited significantly higher Vucm compared to TD children.
  • No significant differences in Vort were found between children with DCD and TD children.
  • Increased Vucm in children with DCD did not negatively impact task performance.

Conclusions:

  • Motor variability in coordination patterns is elevated in children with DCD.
  • This heightened variability, specifically Vucm, does not appear to impair goal-directed reaching performance.
  • High motor variability in DCD may serve adaptive or neutral roles, challenging negative assumptions.