Active motor threshold (AMT)
CONTRACTION
Each participant’s motor threshold was determined during light contraction of the biceps brachii. To ensure consistency between participants and between sessions, a horizontal cursor of 0.01% peak-to-peak Mmax was displayed on a monitor, and participants were required to track the cursor with their rectified biceps brachii EMG amplitude (0.2 s bins). TMS intensity was adjusted by 1% MSO increments in that at least five out of ten TMS pulses elicited an MEP greater than 100 V