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• Sleep Related Terms

- K -

• K complex

Sharp, negative, high-voltage EEG wave, followed by a slower, positive component. K complex, occurring spontaneously during NREM sleep, beginning in (and defining) stage 2. K complexes can be elicited during sleep by external (particularly auditory) stimuli as well.



• K-Alpha

Type of microarousal; K complex followed by several seconds of alpha rhythm.