Accelerated intermittent theta burst stimulation in major depression induces decreases in modularity: A connectome analysis

Network Neuroscience
Karen CaeyenberghsChris Baeken

Abstract

Accelerated intermittent theta burst stimulation (aiTBS) is a noninvasive neurostimulation technique that shows promise for improving clinical outcome in patients suffering from treatment-resistant depression (TRD). Although it has been suggested that aiTBS may evoke beneficial neuroplasticity effects in neuronal circuits, the effects of aiTBS on brain networks have not been investigated until now. Fifty TRD patients were enrolled in a randomized double-blind sham-controlled crossover trial involving aiTBS, applied to the left dorsolateral prefrontal cortex. Diffusion-weighted MRI data were acquired at each of three time points (T1 at baseline; T2 after the first week of real/sham aiTBS stimulation; and T3 after the second week of treatment). Graph analysis was performed on the structural connectivity to examine treatment-related changes in the organization of brain networks. Changes in depression severity were assessed using the Hamilton Depression Rating Scale (HDRS). Baseline data were compared with 60 healthy controls. We observed a significant reduction in depression symptoms over time (p < 0.001). At T1, both TRD patients and controls exhibited a small-world topology in their white matter networks. More importantly, the T...Continue Reading

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Methods Mentioned

BETA
pharmacotherapy

Clinical Trials Mentioned

NCT01832805

Software Mentioned

ExploreDTI
FreeSurfer
REKINDLE
Graph Analytical Toolbox
Graph Analysis Toolbox
Brain Connectivity Toolbox

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