However, SSS may occasionally be accompanied by an after-going slow-wave, and this slow-wave usually has a smaller amplitude relative to the spike.īSSS occur in the broad temporal region and are characteristically difficult to localize precisely.
The identifying features of BSSS include their typically widespread horizontal dipole distribution that occurs in the absence of any apparent disruption of the ongoing background activities. Benign sporadic sleep spikes (BSSS), also referred to as small sharp spikes or benign epileptiform transient of sleep (BETS), are low amplitude (<50 mV), brief (<50 ms), sharply contoured monophasic or biphasic electronegative spikes in theta or alpha frequency range (see figure 1).
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