K-complex
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English
[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/71/Stage2sleep_new.svg/350px-Stage2sleep_new.svg.png)
Etymology
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Pronunciation
[edit]Noun
[edit]K-complex (plural K-complexes)
- (electrencephalography) A waveform that occurs approximately every 60–100 seconds during stage 2 of NREM sleep, and which consists of a brief negative high-voltage peak (usually >100µV), followed by a slower positive complex ~350–550ms, and at 900ms a final negative peak.