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Mapping the effect of escitalopram treatment on amplitude of low-frequency fluctuations in patients with depression: a resting-state fMRI study

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Mapping the effect of escitalopram treatment on amplitude of low-frequency fluctuations in patients with depression: a resting-state fMRI study

Content Provider	Springer Nature Link
Author	Wang, Li Li, Xueni Li, Ke Su, Yunai Zeng, Yawei Zhang, Qinge Wang, Gang Jin, Zhen Kong, Qingmei Si, Tianmei
Copyright Year	2016
Abstract	Antidepressant medications represent the most common treatment option for major depressive disorder (MDD), but the neuro-psychological mechanisms by which antidepressants act to improve depressive symptoms remain under-specified. We designed this study to assess the effects of escitalopram treatment on spontaneous brain activity of MDD patients using functional magnetic resonance imaging (fMRI). Twenty first-episode drug-naive MDD patients received resting-state fMRI scans before and after 8 weeks of treatment with a selective serotonin reuptake inhibitor - escitalopram. Twenty age- and gender-matched healthy controls were also scanned twice with an 8-week interval. The fractional amplitude of low-frequency fluctuation (fALFF) was used to characterize the spontaneous brain activity. The analysis of covariance (ANCOVA) was performed to determine treatment-related changes in fALFF. The symptoms were significantly improved in MDD patients after treatment. We observed significant group-by-time interaction on fALFF in the left dorsomedial prefrontal cortex, the right middle frontal gyrus, and the left putamen. Post-hoc analyses showed that the fALFF values in these regions were significantly higher in the MDD patients compared to healthy controls at baseline and were reduced after treatment. The findings suggest that abnormalities in the brain areas involved in emotional processing and regulation could be normalized by effective antidepressant treatment with escitalopram in the MDD patients and free of a task situation.
Starting Page	147
Ending Page	154
Page Count	8
File Format	PDF
ISSN	08857490
Journal	Metabolic Brain Disease
Volume Number	32
Issue Number	1
e-ISSN	15737365
Language	English
Publisher	Springer US
Publisher Date	2016-08-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Major depressive disorder Antidepressant Escitalopram Resting state fMRI Amplitude of low-frequency fluctuation Neurosciences Neurology Metabolic Diseases Biochemistry Oncology
Content Type	Text
Resource Type	Article
Subject	Biochemistry Neurology (clinical) Cellular and Molecular Neuroscience

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