In this project we are using a state-informed open-loop EEG-TMS setup to investigate whether the mean amplitude of the motor evoked potential (MEP), as evoked by single-pulse transcranial magnetic stimulation (TMS), depends on the endogenous brain state at the time of stimulation. More specifically, we have investigated the four phases of pericentral μ-oscillations (8-12Hz), which has been suggested to reflect different states of excitability.