What are the EEG characteristics of the wicket spikes epileptiform normal variant?

Updated: May 11, 2018
  • Author: Selim R Benbadis, MD; Chief Editor: Helmi L Lutsep, MD  more...
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Answer

Answer

Wicket spikes occur both in the awake state and in light sleep. Their frequency is 6-11 Hz, and they usually occur in short runs (wicket rhythm) but may also appear as single sharp transients. The location is temporal, usually bilateral and independent. The morphology is archlike or mu-like, sharp, monophasic, and not followed by an aftergoing slow wave. The amplitude may be high, but the transient arises out of an ongoing rhythm and does not stand out (see the images below). 

Wicket spikes in left temporal region. Note sharp Wicket spikes in left temporal region. Note sharp transients arising out of ongoing rhythm and symmetric upslope and downslope, giving wicket morphology.
Wicket spikes in left temporal region. Note sharp Wicket spikes in left temporal region. Note sharp transients arising out of ongoing rhythm and symmetric upslope and downslope, giving wicket morphology.
Wicket spikes in left temporal region. Note sharp Wicket spikes in left temporal region. Note sharp transients arising out of ongoing rhythm and symmetric upslope and downslope, giving wicket morphology.

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