In two different studies, we will compare all the results from the EBR rc, PBR rc and MBR rc between BPS patients (first study) or increased blinking patients (second study) and HVs. We will also look for possible correlation between the neurophysiologic data and the clinical scales acquired during a clinical assessment. In the EBR rc procedure, the supraorbital nerve will be stimulated with paired electrical stimuli at varying ISIs and the EMG response from the orbicularis oculi muscles will be recorded. In the PBR rc procedure, paired light stimuli will be given at varying interstimulus intervals (ISIs) and the EMG responses from the orbicularis oculi will be recorded. In the MBR rc study a weak light stimulation will be given at varying ISIs before an electrical stimulation of the supraorbital nerve. Each experimental procedure will last about 1 hour. There will be one screening visit and up to 4 testing visits per participant. However, participant can either undergo all the experimental procedures or participate in only some of them and will be allowed to participate in two experimental procedures per testing visit.