Presupplementary Motor Area Hyperactivity During Response Inhibition: A Candidate Endophenotype of Obsessive-Compulsive Disorder

作者：Stella J. de Wit, Froukje E. de Vries, Ysbrand D. van der Werf, Daniëlle C. Cath, Dirk J. Heslenfeld, Eveline M. Veltman, Anton J.L.M. van Balkom, Dick J. Veltman, Odile A. van den Heuvel · 发表于：American Journal of Psychiatry · 年份：2012 · DOI：10.1176/appi.ajp.2012.12010073 · 被引用次数：312 · 研究领域：Obsessive-Compulsive Spectrum Disorders、Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes、Attention Deficit Hyperactivity Disorder

OBJECTIVE: Endophenotype studies of obsessive-compulsive disorder (OCD) may uncover heritable traits that are related to genetic susceptibility to OCD. Deficient response inhibition is a promising endophenotype of OCD, although its functional neural correlates have not been extensively studied. The authors sought to determine the functional neural correlates of response inhibition in a large sample of medication-free OCD patients and their unaffected siblings. METHOD: Forty-one OCD patients, 17 of their siblings, and 37 matched healthy comparison subjects performed a stop-signal task during 3-T functional MRI. The stop-signal reaction time provided a behavioral measure of response inhibition. The neural correlates of response inhibition were assessed in a region-of-interest analysis that included the presupplementary motor area, inferior frontal gyrus, subthalamic nucleus, and inferior parietal cortex. RESULTS: Patients with OCD had greater stop-signal reaction times relative to healthy comparison subjects. The numerical stop-signal reaction time difference between siblings and comparison subjects failed to reach significance. Both patients with OCD and their siblings showed greater activity in the left presupplementary motor area during successful inhibition relative to comparison subjects. Relative to both the comparison subjects and the siblings, patients with OCD showed decreased activity in the right inferior parietal cortex and inferior frontal gyrus. In patients and si...