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Published on: August 5, 2014
Escitalopram Decreases Cross-Regional Functional Connectivity within the Default-Mode Network
Vincent van de Ven1, Marleen Wingen, Kim P C Kuypers
1Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.
Plos One
|July 5, 2013
Summary
The selective serotonin reuptake inhibitor (SSRI) escitalopram altered default-mode network (DMN) connectivity. Escitalopram decreased regional DMN connectivity, impacting cognition and brain function.
Area of Science:
- Neuroscience
- Neuroimaging
- Pharmacology
Background:
- The default-mode network (DMN) is crucial for intrinsic brain organization.
- The serotonergic system influences DMN functioning.
- Understanding this interaction offers insights into neurobiology.
Purpose of the Study:
- To investigate how the serotonergic system affects DMN functional connectivity.
- To examine the impact of escitalopram, a selective serotonin reuptake inhibitor (SSRI), on DMN connectivity.
Main Methods:
- Utilized resting-state functional MRI (fMRI) with a pharmacological challenge design.
- Administered escitalopram to participants.
- Quantified DMN functional connectivity using dual-regression and spatial independent component analysis.
Main Results:
- Escitalopram did not alter the global functional architecture of the DMN.
- Escitalopram significantly decreased regional pairwise connectivity within the DMN.
- Regional DMN connectivity changes correlated with participants' alertness levels.
Conclusions:
- The serotonergic system, modulated by SSRIs like escitalopram, plays a significant role in intrinsic regional DMN connectivity.
- Altered DMN connectivity may contribute to cognitive processes.
- Pharmacological fMRI challenges are valuable for studying brain functional organization.
