OBJECTIVES: Neuroimaging studies have revealed evidence of brain functional abnormalities in bipolar depressive disorder (BDD) and major depressive disorder (MDD). However, few studies to date have compared these two mood disorders directly. METHODS: Matched groups of 26 BDD type I patients, 26 MDD patients and 26 healthy controls underwent functional magnetic resonance imaging (fMRI) while performing the n-back working memory task. A whole-brain ANOVA was used to compare the three groups and clusters of significant difference were examined further using region-of-interest (ROI) analysis. RESULTS: The whole-brain ANOVA revealed a single cluster of significant difference in the medial frontal cortex. The BDD and MDD patients both showed failure to deactivate in this area compared to the controls. The BDD patients showed significantly greater failure of deactivation than the MDD patients, which was not accounted for by differences in severity or chronicity of illness between them. CONCLUSIONS: Failure of deactivation, considered to reflect default mode network dysfunction, is present to a greater extent in bipolar than unipolar depression. The study of this network may be useful in the search for brain markers that distinguish the two disorders.
OBJECTIVES: Neuroimaging studies have revealed evidence of brain functional abnormalities in bipolar depressive disorder (BDD) and major depressive disorder (MDD). However, few studies to date have compared these two mood disorders directly. METHODS: Matched groups of 26 BDD type I patients, 26 MDDpatients and 26 healthy controls underwent functional magnetic resonance imaging (fMRI) while performing the n-back working memory task. A whole-brain ANOVA was used to compare the three groups and clusters of significant difference were examined further using region-of-interest (ROI) analysis. RESULTS: The whole-brain ANOVA revealed a single cluster of significant difference in the medial frontal cortex. The BDD and MDDpatients both showed failure to deactivate in this area compared to the controls. The BDDpatients showed significantly greater failure of deactivation than the MDDpatients, which was not accounted for by differences in severity or chronicity of illness between them. CONCLUSIONS: Failure of deactivation, considered to reflect default mode network dysfunction, is present to a greater extent in bipolar than unipolar depression. The study of this network may be useful in the search for brain markers that distinguish the two disorders.
Authors: Lícia P Pereira; Cristiano A Köhler; Brendon Stubbs; Kamilla W Miskowiak; Gerwyn Morris; Bárbara P de Freitas; Trevor Thompson; Brisa S Fernandes; André R Brunoni; Michael Maes; Diego A Pizzagalli; André F Carvalho Journal: Prog Neuropsychopharmacol Biol Psychiatry Date: 2018-05-17 Impact factor: 5.067
Authors: Jay C Fournier; Michele Bertocci; Cecile D Ladouceur; Lisa Bonar; Kelly Monk; Halimah Abdul-Waalee; Amelia Versace; João Paulo Lima Santos; Satish Iyengar; Boris Birmaher; Mary L Phillips Journal: Neuropsychopharmacology Date: 2021-03-29 Impact factor: 8.294
Authors: Annemnarie Wolff; Sara de la Salle; Alana Sorgini; Emma Lynn; Pierre Blier; Verner Knott; Georg Northoff Journal: Front Psychiatry Date: 2019-10-15 Impact factor: 4.157
Authors: Anna Manelis; Yaroslav O Halchenko; Lisa Bonar; Richelle S Stiffler; Skye Satz; Rachel Miceli; Cecile D Ladouceur; Genna Bebko; Satish Iyengar; Holly A Swartz; Mary L Phillips Journal: Transl Psychiatry Date: 2022-10-11 Impact factor: 7.989