Neural basis of the emotional Stroop interference effect in major depression
| Autor: | Cynthia H.Y. Fu, Catherine Donaldson, Anthony J. Cleare, Jan Scott, Martina T. Mitterschiffthaler, Steven Williams, Nicholas D. Walsh |
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| Rok vydání: | 2007 |
| Předmět: |
Adult
Male medicine.medical_specialty Adolescent Neuropsychological Tests Audiology Gyrus Cinguli Severity of Illness Index behavioral disciplines and activities Developmental psychology Functional neuroimaging mental disorders medicine Humans Emotional expression Applied Psychology Depression (differential diagnoses) Anterior cingulate cortex Depressive Disorder Major medicine.diagnostic_test Brain Cognition medicine.disease Magnetic Resonance Imaging Psychiatry and Mental health medicine.anatomical_structure Major depressive disorder Female Cognition Disorders Psychology Functional magnetic resonance imaging psychological phenomena and processes Stroop effect |
| Zdroj: | Psychological Medicine. 38:247-256 |
| ISSN: | 1469-8978 0033-2917 |
| DOI: | 10.1017/s0033291707001523 |
| Popis: | BackgroundA mood-congruent sensitivity towards negative stimuli has been associated with development and maintenance of major depressive disorder (MDD). The emotional Stroop task assesses interference effects arising from the conflict of emotional expressions consistent with disorder-specific self-schemata and cognitive colour-naming instructions. Functional neuroimaging studies of the emotional Stroop effect advocate a critical involvement of the anterior cingulate cortex (ACC) during these processes.MethodSubjects were 17 medication-free individuals with unipolar MDD in an acute depressive episode (mean age 39 years), and 17 age-, gender- and IQ-matched healthy volunteers. In an emotional Stroop task, sad and neutral words were presented in various colours, and subjects were required to name the colour of words whilst undergoing functional magnetic resonance imaging (fMRI). Overt verbal responses were acquired with a clustered fMRI acquisition sequence.ResultsIndividuals with depression showed greater increases in response time from neutral to sad words relative to controls. fMRI data showed a significant engagement of left rostral ACC (BA 32) and right precuneus during sad words in patients relative to controls. Additionally, rostral ACC activation was positively correlated with latencies of negative words in MDD patients. Healthy controls did not have any regions of increased activation compared to MDD patients.ConclusionsThese findings provide evidence for a behavioural and neural emotional Stroop effect in MDD and highlight the importance of the ACC during monitoring of conflicting cognitive processes and mood-congruent processing in depression. |
| Databáze: | OpenAIRE |
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