• Clin Neurophysiol · Jul 2014

    Randomized Controlled Trial

    Effects of mindfulness-based cognitive therapy on neurophysiological correlates of performance monitoring in adult attention-deficit/hyperactivity disorder.

    • Poppy L A Schoenberg, Sevket Hepark, Cornelis C Kan, Henk P Barendregt, Jan K Buitelaar, and Anne E M Speckens.
    • Faculty of Science, Intelligent Systems, Radboud University Nijmegen, The Netherlands; Radboud University Nijmegen Medical Centre, Department of Cognitive Neuroscience, Nijmegen, The Netherlands. Electronic address: schoenberg@scientist.com.
    • Clin Neurophysiol. 2014 Jul 1; 125 (7): 1407-16.

    ObjectiveTo examine whether mindfulness-based cognitive therapy (MBCT) would enhance attenuated amplitudes of event-related potentials (ERPs) indexing performance monitoring biomarkers of attention-deficit/hyperactivity disorder (ADHD).MethodsFifty adult ADHD patients took part in a randomised controlled study investigating ERP and clinical measures pre-to-post MBCT. Twenty-six patients were randomly allocated to MBCT, 24 to a wait-list control. Main outcome measures included error processing (ERN, Pe), conflict monitoring (NoGo-N2), and inhibitory control (NoGo-P3) ERPs concomitant to a continuous performance task (CPT-X). Inattention and hyperactivity-impulsivity ADHD symptoms, psychological distress and social functioning, and mindfulness skills were also assessed.ResultsMBCT was associated with increased Pe and NoGo-P3 amplitudes, coinciding with reduced 'hyperactivity/impulsivity' and 'inattention' symptomatology. Specific to the MBCT; enhanced Pe amplitudes correlated with a decrease in hyperactivity/impulsivity symptoms and increased 'act-with-awareness' mindfulness skill, whereas, enhanced P3 correlated with amelioration in inattention symptoms.ConclusionsMBCT enhanced ERP amplitudes associated with motivational saliency and error awareness, leading to improved inhibitory regulation.SignificanceMBCT suggests having comparable modulation on performance monitoring ERP amplitudes as pharmacological treatments. Further study and development of MBCT as a treatment for ADHD is warranted, in addition to its potential scope for clinical applicability to broader defined externalising disorders and clinical problems associated with impairments of the prefrontal cortex.Copyright © 2013 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.

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