 This study found that repetitive transcranial magnetic stimulation, RTMS, did not significantly change corticospinal excitability when compared to sham stimulation. Additionally, the study showed that RTMS did not produce more significant changes than sham stimulation, even when controlled for potential experimental factors such as baseline corticospinal excitability, TMS coil deviation, and the number of individual motor evoked potential, MEP, trials. This suggests that RTMS may not be effective at changing corticospinal excitability and should be further investigated before being used in clinical settings. This article was authored by Justine Magnuson, Mehmet Ayuzdemir, Elon Matheson, and others.