Back to Journals » Neuropsychiatric Disease and Treatment » Volume 12

A longitudinal, event-related potential pilot study of adult obsessive-compulsive disorder with 1-year follow-up

Authors Yamamuro K, Okada K, Kishimoto N, Ota T, Iida J, Kishimoto T

Received 13 July 2016

Accepted for publication 10 August 2016

Published 26 September 2016 Volume 2016:12 Pages 2463—2471

DOI https://doi.org/10.2147/NDT.S117100

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Lucy Goodman

Peer reviewer comments 2

Editor who approved publication: Dr Taro Kishi


Kazuhiko Yamamuro,1 Koji Okada,2 Naoko Kishimoto,1 Toyosaku Ota,1 Junzo Iida,3 Toshifumi Kishimoto1

1Department of Psychiatry, Nara Medical University School of Medicine, 2Department of Psychiatry, Jingumaecocorono-Clinic, 3Faculty of Nursing, Nara Medical University School of Medicine, Kashihara, Japan

Aim: Earlier brain imaging research studies have suggested that brain abnormalities in obsessive-compulsive disorder (OCD) normalize as clinical symptoms improve. However, although many studies have investigated event-related potentials (ERPs) in patients with OCD compared with healthy control subjects, it is currently unknown whether ERP changes reflect pharmacological and psychotherapeutic effects. As such, the current study examined the neurocognitive components of OCD to elucidate the pathophysiological abnormalities involved in the disorder, including the frontal-subcortical circuits.
Methods: The Yale-Brown Obsessive-Compulsive Scale was used to evaluate 14 adult patients with OCD. The present study also included ten age-, sex-, and IQ-matched controls. The P300 and mismatch negativity (MMN) components during an auditory oddball task at baseline for both groups and after 1 year of treatment for patients with OCD were measured.
Results: Compared with controls, P300 amplitude was attenuated in the OCD group at Cz and C4 at baseline. Pharmacotherapy and psychotherapy treatment for 1 year reduced OCD symptomology. P300 amplitude after 1 year of treatment was significantly increased, indicating normalization compared with baseline at Fz, Cz, C3, and C4. We found no differences in P300 latency, MMN amplitude, or MMN latency between baseline and after one year of treatment.
Conclusion: ERPs may be a useful tool for evaluating pharmacological and cognitive behavioral therapy in adult patients with OCD.

Keywords: obsessive-compulsive disorder, event-related potentials, P300, mismatch negativity, improvement

Creative Commons License This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution - Non Commercial (unported, v3.0) License. By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms.

Download Article [PDF]  View Full Text [HTML][Machine readable]