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Publication Detail
Mapping causal interregional influences with concurrent TMS-fMRI.
Transcranial magnetic stimulation (TMS) produces a direct causal effect on brain activity that can now be studied by new methods that simultaneously combine TMS with neuroimaging approaches such as functional magnetic resonance imaging (fMRI). In this review we highlight recent concurrent TMS-fMRI studies that illustrate how this novel combined technique may provide unique insights into causal interactions among brain regions in humans. We show how fMRI can detect the spatial topography of local and remote TMS effects and how these may vary with psychological factors such as task-state. Concurrent TMS-fMRI may furthermore reveal how the brain adapts to so-called virtual lesions induced by TMS, and the distributed activity changes that may underly the behavioural consequences often observed during cortical stimulation with TMS. We argue that combining TMS with neuroimaging techniques allows a further step in understanding the physiological underpinnings of TMS. This can provide powerful new insights about causal interactions among brain regions in both health and disease that may ultimately lead to developing more efficient protocols for therapeutic TMS applications.
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Clinical and Movement Neurosciences
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