Grey matter volumes in treatment naïve vs. chronically treated children with attention deficit/hyperactivity disorder: a combined approach

Research output: Contribution to journalArticle

Authors

  • Thomas Villemonteix
  • Martin Kavec
  • Danielle Balériaux
  • Thierry Metens
  • Hichem Slama
  • Simon Baijot
  • Alison Mary
  • Philippe Peigneux
  • Isabelle Massat

Colleges, School and Institutes

External organisations

  • INSERM
  • Radiology Department
  • INSERM, U894
  • Clinics of Magnetic Resonance
  • Erasme Hospital
  • UNESCOG - Research Unit in Cognitive Neurosciences, ULB
  • Department of Clinical and Cognitive Neuropsychology
  • Erasme Hospital
  • UR2NF - Université Libre de Bruxelles (ULB)
  • UNI - ULB Neurosciences Institute, ULB
  • National Fund of Scientific Research (FNRS

Abstract

Psychostimulants are the first-line treatment in attention deficit/hyperactivity disorder (ADHD), but their effects on brain development remain poorly understood. In particular, previous structural magnetic resonance imaging (sMRI) studies only investigated treatment effects on grey matter (GM) volumes in selected regions of interest (ROIs). In this study, voxel-based morphometry (VBM) was used to assess medication-related GM volume differences across the entire brain. Automated tracing measurements of selected ROIs were also obtained. Three groups (77 participants aged 7-to-13 year old) underwent MRI scans and were compared: never-medicated children with ADHD (n=33), medicated (methylphenidate) children with ADHD (n=20) and typically developing children (TD; n=24). Optimised VBM was used to investigate regional GM volumes, controlling for age and gender. Automated tracing procedures were also used to assess the average volume of the caudate nucleus, the amygdala and the nucleus accumbens. When compared to both medicated children with ADHD and TD children, never-medicated children with ADHD exhibited decreased GM volume in the insula and in the middle temporal gyrus. When compared to TD children, medicated children with ADHD had decreased GM volume in the middle frontal gyrus and in the precentral gyrus. Finally, ROI analyses revealed a significant association between duration of treatment and GM volume of the left nucleus accumbens in medicated children with ADHD. In conclusion, this study documents potential methylphenidate-related GM volume normalization and deviation in previously unexplored brain structures, and reports a positive association between treatment history and GM volume in the nucleus accumbens, a key region for reward-processing.

Details

Original languageEnglish
Pages (from-to)1118-1127
Number of pages10
JournalEuropean Neuropsychopharmacology
Volume25
Issue number8
Early online date18 Apr 2015
Publication statusPublished - 1 Aug 2015

Keywords

  • Attention deficit hyperactivity disorder (ADHD), Structural MRI, Voxel-based morphometry, Methylphenidate, Nucleus accumbens