Orbitofrontal dysfunction during the reward process in adults with ADHD: An fMRI study

Dong Yu Yang, Mei Hung Chi, Ching Lin Chu, Chun Yu Lin, Shuo En Hsu, Kao Chin Chen, I. Hui Lee, Po See Chen, Yen Kuang Yang

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Abstract

Objective: The present study aimed to detect differences in the reward response between adults with attention deficit hyperactivity disorder (ADHD) and healthy controls (HCs) using functional magnetic resonance imaging (fMRI). Methods: The Iowa gambling task (IGT) was designed to explore participants’ reward-related decision-making in relation to selections during risky behaviors. Twenty adults with ADHD and 20 HCs were enrolled. fMRI with a modified IGT was performed. Results: The adults with ADHD showed a poorer performance in terms of avoidance during risky behaviors. The fMRI results indicated that the adults with ADHD had significantly lower orbitofrontal cortex (OFC) activation. A positive correlation between performance in the IGT and brain activation in the OFC was detected. Conclusions: The results suggested that the adults with ADHD exhibited abnormal OFC responses during decision-making. Significance: To the best of our knowledge, this is the first study to use fMRI to collect brain activation data while performing the IGT in adults with ADHD. Our findings suggest that deficits in reward processing in ADHD are still present during adulthood.

Original languageEnglish
Pages (from-to)627-633
Number of pages7
JournalClinical Neurophysiology
Volume130
Issue number5
DOIs
Publication statusPublished - 2019 May

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Keywords

  • ADHD
  • fMRI
  • Iowa gambling task
  • Orbitofrontal cortex

ASJC Scopus subject areas

  • Sensory Systems
  • Neurology
  • Clinical Neurology
  • Physiology (medical)

Cite this

Yang, D. Y., Chi, M. H., Chu, C. L., Lin, C. Y., Hsu, S. E., Chen, K. C., Lee, I. H., Chen, P. S., & Yang, Y. K. (2019). Orbitofrontal dysfunction during the reward process in adults with ADHD: An fMRI study. Clinical Neurophysiology, 130(5), 627-633. https://doi.org/10.1016/j.clinph.2019.01.022