MyoclonusMovementEpilepsies, MyoclonicMyoclonic Epilepsies, ProgressiveLafora DiseaseUnverricht-Lundborg SyndromeEye MovementsCystatin BClonazepamReflex, AbnormalEvoked Potentials, SomatosensoryElectromyographyMyoclonic Cerebellar DyssynergiaMERRF SyndromeProtein Tyrosine Phosphatases, Non-ReceptorLisurideElectroencephalographyMuscle RigidityMovement DisordersCerebellar AtaxiaAtaxiaHead Movements