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Mirror neuron system activation in children with developmental coordination disorder: A replication functional MRI

J E Reynolds1, J Billington2, S Kerrigan1

  • 1School of Human Sciences, The University of Western Australia, Australia.

Research in Developmental Disabilities
|December 25, 2017
PubMed
Summary

This study found no evidence that mirror neuron system (MNS) dysfunction causes developmental coordination disorder (DCD). Brain scans showed similar MNS activation in children with and without DCD, suggesting other factors may be involved.

Keywords:
DCDDevelopmental coordination disorderFunctional magnetic resonance imagingImitationMirror neuron systemMotor imageryfMRI

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Motor Control

Background:

  • Abnormal mirror neuron system (MNS) functioning is hypothesized to cause motor impairments in developmental coordination disorder (DCD).
  • Deficits in imitation and internal movement representation are linked to MNS dysfunction.

Purpose of the Study:

  • To investigate brain activation patterns in children with and without DCD during MNS tasks using fMRI.
  • To compare MNS activation during observation, motor imagery, execution, and imitation in DCD and control groups.

Main Methods:

  • fMRI was used to examine brain activity in 19 boys (8.25-12.75 years).
  • Participants included 10 children with DCD and 9 typically developing controls.
  • A finger adduction/abduction task was performed under four MNS activation states.

Main Results:

  • No significant differences in MNS activation were observed between the DCD and control groups.
  • Children with DCD showed behavioral deficits in imitation and motor imagery prior to scanning.
  • Reduced activation in non-mirror regions (thalamus, caudate, posterior cingulate) was noted in the DCD group during imitation.

Conclusions:

  • The findings do not support the MNS dysfunction theory as a cause of DCD.
  • Further research into attentional and motor planning networks is recommended to understand DCD.