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• W2068448466 abstract "Background The present study is aimed to examine the neuronal correlates of Stroop interference in medication-free patients with major depressive disorder. Methods Sixteen patients fulfilling Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) criteria for unipolar depression and 16 healthy control subjects matched for age, gender, and education were included. All subjects underwent an event-related functional magnetic resonance imaging (fMRI) design with an adapted version of the Stroop task including congruent and incongruent task conditions. The fMRI experiment was conducted on a 1.5 T magnetic resonance (MR) scanner, and item responses were given manually by the subjects. Results With regard to behavioral performance, patients revealed no differences in both reaction time and accuracy relative to control subjects. With regard to brain activations, direct comparison of patients with control subjects in the interference condition revealed hyperactivity in rostral anterior cingulate gyrus (rACG) and left dorsolateral prefrontal cortex (DLPFC) in depressive patients, which correlated strongly with the Stroop interference. Conclusions The study provides new evidence for the functioning and dissociation of the anterior cingulate in depressed patients. The greater prefrontal activation may reflect a cortical inefficiency due to hyperactivity in rACG enhancing the cognitive interferences from the emotional state. The present study is aimed to examine the neuronal correlates of Stroop interference in medication-free patients with major depressive disorder. Sixteen patients fulfilling Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) criteria for unipolar depression and 16 healthy control subjects matched for age, gender, and education were included. All subjects underwent an event-related functional magnetic resonance imaging (fMRI) design with an adapted version of the Stroop task including congruent and incongruent task conditions. The fMRI experiment was conducted on a 1.5 T magnetic resonance (MR) scanner, and item responses were given manually by the subjects. With regard to behavioral performance, patients revealed no differences in both reaction time and accuracy relative to control subjects. With regard to brain activations, direct comparison of patients with control subjects in the interference condition revealed hyperactivity in rostral anterior cingulate gyrus (rACG) and left dorsolateral prefrontal cortex (DLPFC) in depressive patients, which correlated strongly with the Stroop interference. The study provides new evidence for the functioning and dissociation of the anterior cingulate in depressed patients. The greater prefrontal activation may reflect a cortical inefficiency due to hyperactivity in rACG enhancing the cognitive interferences from the emotional state." @default.
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• W2068448466 date "2006-05-01" @default.
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• W2068448466 title "Cortical Inefficiency in Patients with Unipolar Depression: An Event-Related fMRI Study with the Stroop Task" @default.
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• W2068448466 doi "https://doi.org/10.1016/j.biopsych.2005.10.025" @default.
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