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Network-level macroscale structural connectivity predicts propagation of transcranial magnetic stimulation
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Network-level macroscale structural connectivity predicts propagation of transcranial magnetic stimulation
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Journal Article
Network-level macroscale structural connectivity predicts propagation of transcranial magnetic stimulation
2021
Overview
Information processing in the brain is mediated by structural white matter pathways and is highly dependent on topological brain properties. Here we combined transcranial magnetic stimulation (TMS) with high-density electroencephalography (EEG) and Diffusion Weighted Imaging (DWI), specifically looking at macroscale connectivity to understand whether regional, network-level or whole-brain structural properties are more responsible for stimulus propagation. Neuronavigated TMS pulses were delivered over two individually defined nodes of the default mode (DMN) and dorsal attention (DAN) networks in a group of healthy subjects, with test-retest reliability assessed 1-month apart. TMS-evoked activity was predicted by the modularity and structural integrity of the stimulated network rather than the targeted region(s) or the whole-brain connectivity, suggesting network-level structural connectivity as more relevant than local and global brain properties in shaping TMS signal propagation. The importance of network structural connectome was unveiled only by evoked activity, but not resting-state data. Future clinicals interventions might enhance target engagement by adopting DWI-guided, network-focused TMS.
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Publisher
Elsevier Inc,Elsevier Limited,Elsevier
Subject
/ Brain
/ Default Mode Network - diagnostic imaging
/ Default Mode Network - physiology
/ EEG
/ Electroencephalography - methods
/ Female
/ Humans
/ Magnetic Resonance Imaging - methods
/ Male
/ Nerve Net - diagnostic imaging
/ Network
/ Transcranial magnetic stimulation
