... transients of sleep (BETS), 46 Benign variants of uncertain significance, 42 49 1 4- and 6-Hz positive bursts as, 45 6-Hz spike-and-wave burst as, 44 benign epileptiform transients of sleep (BETS) ... 122, 142 – 146 coma and, 132, 145 complex partial, 144 continuous spike-and-wave dis-charges (CSWS) in, 146 convulsive (CSE), 122delta frequencies in, 142 electrical SE of slow sleep (ESES)and, 146 epilepsia ... 197, 198 6- and 1 4- Hz positive bursts, 45 6-Hz spike-and-wave burst, 44 60-cycle artifact, 22Sleep, 2, 35–38, 149 . See alsopolysomnographyabsence seizures in, 99–101alpha, 35alpha-delta pattern...