Claudia Tischler Humanities and Social Science
Exploring the correlation between beta oscillations and MEPs during movement preparation
Motor preparation can be probed using both electroencephalography (EEG) and Transcranial Magnetic Stimulation (TMS), a noninvasive brain stimulation technique which evokes a response called the motor-evoked potential (MEP) from the targeted muscle. However, recording MEPs is problematicthe MEP is highly variable from trial to trial, and the sources of fluctuations in MEP amplitude are debated. Some of this variability, as well as the temporal dynamics of the MEP, may be explained by neural oscillations, endogenous fluctuations in brain activity. During the preparatory period, both the MEP amplitude and beta power decrease on average, but it is unknown if the two are correlated trial-by-trial. By simultaneously recording MEPs and from EEG using a combined TMS-EEG method, my SURF project will test the hypothesis that MEP amplitude beta frequency band activity will have different patterns of correlation in early vs. late periods of motor preparation.