K complex

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  • Presence in Non-REM 2 sleep
  • High amplitude (>100 microV)
  • Long duration (>200ms)
  • Diphasic
  • Often associated with sleep spindles
  • Location: Frontocentral with the maximum at Cz or Fz.



Diphasic K-complex with a maximum at Cz in non REM 2 sleep K-complex (average) eegpedia.png