Navigated TMS offers scientists the ability to non-invasively probe the brain with unparalleled accuracy.
Together with TMS, EEG can be used in several ways. In TMS-EEG, EEG is used simultaneously during TMS to measure TMS-evoked cortical reactivity and connectivity. In brain state-dependent (sometimes also called "closed-loop TMS") TMS, TMS is externally triggered based on on-going cortical activity recorded and monitored via EEG. In some TMS practices, EEG is also used as a standalone imaging modality to quantify cortical changes following TMS, and to monitor spontaneous and evoked brain activity in patients prone to epileptic seizures as an add-on safety procedure.