Small sharp spikes (SSS of BETS)

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Small sharp spikes (SSS) Synonymes: BETS (Benign Epileptiform Transients of Sleep) and bening sporadic sleep spikes

  • Occur in light sleep (non-REM 1 and 2 sleep)
  • Amplitude of <50 microV and duration of <50 ms
  • Usually monophasic, occasionally diphasic
  • Occasionally followed by a slow wave, however do not disturb the background
  • Located temporal uni- or bilateral
  • Incidence of 20%
  • Small sharp spikes are not associated with epilepsy

Small sharp spikes bilateral during non-REM 1 sleep (average)

SSS bitemporal (average).png