File:Bilateral Electric Transcranial Stimulation.jpg|'''Figure 1b:''' Motor evoked potential from electrical transcranial stimulation of the trigeminal roots.Note the structural symmetry calculated by the peak-to-peak amplitude on the left and right masseters (traces upper and lower respectively) | File:Bilateral Electric Transcranial Stimulation.jpg|'''Figure 1b:''' Motor evoked potential from electrical transcranial stimulation of the trigeminal roots.Note the structural symmetry calculated by the peak-to-peak amplitude on the left and right masseters (traces upper and lower respectively) |