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Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging
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Published on: September 12, 2011

Overflow movements and white matter abnormalities in ADHD.

Elisa D'Agati1, Livia Casarelli, Maria Bernarda Pitzianti

  • 1Unit of Child Neurology and Psychiatry, Department of Neuroscience, University of Rome Tor Vergata, Italy. elisadagati@gmail.com

Progress in Neuro-Psychopharmacology & Biological Psychiatry
|January 27, 2010
PubMed
Summary
This summary is machine-generated.

Children with Attention Deficit/Hyperactivity Disorder (ADHD) often exhibit motor abnormalities like overflow movements. These movements may stem from white matter abnormalities in brain circuits crucial for motor control.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Pediatrics

Background:

  • Attention Deficit/Hyperactivity Disorder (ADHD) is associated with various motor deficits in children.
  • Motor abnormalities include persistent overflow movements, impaired motor response timing, and fine motor skill deficits.
  • Motor overflow, defined as unnecessary co-movement during tasks, may indicate immature cortical motor inhibition.

Purpose of the Study:

  • To review scientific literature on the relationship between overflow movements and white matter (WM) abnormalities in ADHD.
  • To explore the potential neurobiological underpinnings of motor overflow in children with ADHD.

Main Methods:

  • Systematic review of existing research on overflow movements and WM abnormalities in ADHD.
  • Analysis of theories implicating white matter tracts, such as the corpus callosum, in motor control and inhibition.

Main Results:

  • Evidence suggests a link between WM abnormalities in motor/premotor circuits and the presence of overflow movements in ADHD.
  • Alterations in specific brain networks' white matter connections may influence motor behaviors observed in ADHD.

Conclusions:

  • White matter abnormalities in motor and premotor circuits are likely responsible for overflow movements in children with ADHD.
  • These findings highlight the importance of investigating white matter integrity for understanding motor deficits in ADHD.