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Selective modulation of brain network dynamics by seizure therapy in treatment-resistant depression.

Abstract：

BACKGROUND:Electroconvulsive therapy (ECT) is highly effective for treatment-resistant depression, yet its mechanism of action is still unclear. Understanding the mechanism of action of ECT can advance the optimization of magnetic seizure therapy (MST) towards higher efficacy and less cognitive impairment. Given the neuroimaging evidence for disrupted resting-state network dynamics in depression, we investigated whether seizure therapy (ECT and MST) selectively modifies brain network dynamics for therapeutic efficacy. METHODS:EEG microstate analysis was used to evaluate resting-state network dynamics in patients at baseline and following seizure therapy, and in healthy controls. Microstate analysis defined four classes of brain states (labelled A, B, C, D). Source localization identified the brain regions associated with these states. RESULTS:An increase in duration and decrease in frequency of microstates was specific to responders of seizure therapy. Significant changes in the dynamics of States A, C and D were observed and predicted seizure therapy outcome (specifically ECT). Relative change in the duration of States C and D was shown to be a strong predictor of ECT response. Source localization partly associated C and D to the salience and frontoparietal networks, argued to be impaired in depression. An increase in duration and decrease in frequency of microstates was also observed following MST, however it was not specific to responders. CONCLUSION:This study presents the first evidence for the modulation of global brain network dynamics by seizure therapy. Successful seizure therapy was shown to selectively modulate network dynamics for therapeutic efficacy.

journal_name

Neuroimage Clin

journal_title

NeuroImage. Clinical

authors

Atluri S,Wong W,Moreno S,Blumberger DM,Daskalakis ZJ,Farzan F

doi

10.1016/j.nicl.2018.10.015

subject

Has Abstract

pub_date

2018-01-01 00:00:00

pages

1176-1190

issn

2213-1582

pii

S2213-1582(18)30325-5

journal_volume

20

pub_type

杂志文章

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