Figure 1.

(A) Example trace illustrating the calculation of voluntary inactivation (VIA). Here, VIA (%) = [Electrically evoked doublet torque during MVC/Electrically evoked doublet torque at rest following MVC] × 100. (B) Example trace of the evoked responses using transcranial magnetic stimulation (TMS). Note the motor evoked potential (MEP) followed by period of motor cortical quiescence or silent period (SP) after delivery of a supramaximal TMS pulse of 130% of active motor threshold to the motor cortex while the participant is performing a muscle contraction.