Source: wikibot/sleep-spindle
= Sleep spindle
{wiki=Sleep_spindle}
Sleep spindles are bursts of oscillatory brain activity that occur during non-REM (NREM) sleep, particularly during stage 2 sleep. They are characterized by their frequency, which typically ranges from 12 to 16 Hz, and their duration, which usually lasts for about 0.5 to 2 seconds.