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Electrophysiological correlates of behavioral response inhibition in patients with obsessive–compulsive disorder
Author(s) -
Kim MyungSun,
Kim Young Youn,
Yoo So Young,
Kwon Jun Soo
Publication year - 2006
Publication title -
depression and anxiety
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.634
H-Index - 129
eISSN - 1520-6394
pISSN - 1091-4269
DOI - 10.1002/da.20195
Subject(s) - response inhibition , electrophysiology , psychology , obsessive compulsive , anxiety , event related potential , neuroscience , anxiety disorder , depression (economics) , audiology , clinical psychology , psychiatry , electroencephalography , cognition , medicine , economics , macroeconomics
In this study, we have attempted to determine the electrophysiological correlates of behavioral response inhibition in patients with obsessive–compulsive disorder (OCD). To evaluate response inhibition ability, we have used the Go/NoGo task and measured N2 and P3 event‐related potential (ERP) components. Both the OCD and control groups exhibited greater and more frontally distributed N2 and P3 amplitudes in the NoGo condition compared to what we observed in the Go condition. However, the patients with OCD also manifested reduced NoGo–N2 and Go–N2 amplitudes at the frontocentral electrode sites compared to the controls. In addition, the NoGo–N2 amplitudes were more posteriorly distributed in patients with OCD than in controls. The NoGo–N2 amplitudes and latencies measured at the central sites were also negatively correlated with the obsession score on the Yale–Brown Obsessive Compulsive Scale (Y‐BOCS). The OCD and control groups were comparable with regard to Go–P3 and NoGo–P3 amplitude and latencies. Our findings suggest dysfunctions in frontal regions mediating response inhibition in OCD, consistent with the involvement of response inhibition in the pathophysiology of this disorder. In addition, NoGo–N2 seems to result in more accurate response inhibition measurements in patients with OCD than does NoGo–P3. Depression and Anxiety 24:22–31, 2007. © 2006 Wiley‐Liss, Inc.