[1] Radboud Univ Nijmegen, NICI, Dept Biol Psychol, NL-6500 HE Nijmegen, Netherlands
[2] Dutch Epilepsy Clin Fdn, Heemstede, Netherlands
[3] Warsaw Univ, Inst Expt Phys, Lab Med Phys, Warsaw, Poland
[4] Univ Warsaw, Inst Expt Phys, Lab Biomed Phys, PL-00681 Warsaw, Poland
[5] Russian Acad Sci, Inst Higher Nervous Act & Neurophysiol, Moscow, Russia
[6] Radboud Univ Nijmegen, FC Donders Ctr Cognit Neuroimaging, NL-6500 HB Nijmegen, Netherlands