Figure 6From: Lovastatin improves impaired synaptic plasticity and phasic alertness in patients with neurofibromatosis type 1 Timeline of PAS experiment. We measured motor evoked potentials (MEP) amplitudes as well as resting motor threshold before and at three points in time after paired associative stimulation (PAS). PAS was performed with an interstimulus interval of 25Â ms.Back to article page