Effects of Docosahexaenoic Acid Supplementation on Cortical Network Integrity in Medication-Free Children with Attention-Deficit/Hyperactivity Disorder: A Preliminary Multimodal Neuroimaging Trial

Authors

  • Wade A. Weber Department of Psychiatry and Behavioral Neuroscience, Center for Imaging Research, University of Cincinnati College of Medicine, Cincinnati, OH, USA
  • Max J. Tallman Department of Psychiatry and Behavioral Neuroscience, Center for Imaging Research, University of Cincinnati College of Medicine, Cincinnati, OH, USA
  • Thomas J. Blom Department of Psychiatry and Behavioral Neuroscience, Center for Imaging Research, University of Cincinnati College of Medicine, Cincinnati, OH, USA
  • Jennifer D. Schurdak Department of Psychiatry and Behavioral Neuroscience, Center for Imaging Research, University of Cincinnati College of Medicine, Cincinnati, OH, USA
  • L. Rodrigo Patino Department of Psychiatry and Behavioral Neuroscience, Center for Imaging Research, University of Cincinnati College of Medicine, Cincinnati, OH, USA
  • Robert K. McNamara Department of Psychiatry and Behavioral Neuroscience, Center for Imaging Research, University of Cincinnati College of Medicine, Cincinnati, OH, USA

DOI:

https://doi.org/10.6000/1929-5634.2017.06.04.3

Keywords:

Omega-3 fatty acids, Attention, Anterior cingulate cortex, Functional magnetic resonance imaging, Diffusion tensor imaging, Children

Abstract

Children with attention deficit/hyperactivity disorder (ADHD) exhibit blood docosahexaenoic acid (DHA) deficits and cortical network pathology. This neuroimaging study investigated the effects of DHA supplementation on cortical attention network integrity in medication-free children with ADHD. Children (mean age 9.6 years, n=30) with ADHD were randomized to DHA (1,200 mg/d) or placebo for 10 weeks. Blood DHA levels and ADHD symptom severity ratings were obtained from all participants (n=30). Cortical network integrity was evaluated in a subset of patients (n=20) using functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI). Erythrocyte DHA levels increased significantly in patients receiving DHA (+60%, p≤0.0001) but not placebo (-4%, p=0.77). There were no group differences in baseline-endpoint change in ADHD symptom severity scores, sustained attention performance, or voxelwise cortical activation patterns during performance of a sustained attention task. In the region-of-interest (ROI) analysis, patients treated with DHA but not placebo exhibited significant endpoint reductions in left amygdala activation. At study endpoint, but not at baseline, DHA-treated patients exhibited significantly greater event-related functional connectivity between the pregenual and subgenual anterior cingulate cortex and regions within the cortical attention network including the inferior parietal lobe and dorsolateral prefrontal cortex compared with placebo. Trends with large effect sizes for reductions in medial and radial diffusivity in the left corpus callosum were observed in DHA-treated patients. These preliminary findings suggest that DHA supplementation may be associated with subtle changes in cortical attention networks of medication-free children with ADHD which warrant additional investigation in a larger patient sample.

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Published

2018-01-08

How to Cite

Weber, W. A., Tallman, M. J., Blom, T. J., Schurdak, J. D., Patino, L. R., & McNamara, R. K. (2018). Effects of Docosahexaenoic Acid Supplementation on Cortical Network Integrity in Medication-Free Children with Attention-Deficit/Hyperactivity Disorder: A Preliminary Multimodal Neuroimaging Trial. Journal of Nutritional Therapeutics, 6(4), 92–106. https://doi.org/10.6000/1929-5634.2017.06.04.3

Issue

Vol. 6 No. 4 (2017)

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General Articles

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