14 and 6 Hz Positive Spikes

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Montage: unspecified


  • sharp positive component, rounded negative component
  • predominantly in light sleep
  • runs usually less than 2 seconds
  • posterior temporal, unilaterally or bilaterally
  • medium amplitude: 20-60 uV

clinical significance

normal variant

  • seen predominantly in adolescents, especially age 13-14 years, although it can be seen at any age
  • 6-Hz positive spikes: predominate in children < 1 year and adults > 40 years
  • 14-Hz positive spikes: predominate or combine with 6-Hz spikes in other age groups