Benign Epileptiform Transients of Sleep (BETS)

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appearance

• occur in stage 1 or 2 NREM sleep.
• usually monophasic, occasionally diphasic.
• temporal with broad field of distribution
• There is typically no disturbance of the background, although there is sometimes a single aftergoing slow wave.
• typically less than 50 microvolts, less than 50 milliseconds

clinical significance