What are the characteristics of the midline theta rhythm 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

Midline theta rhythm (ie, Ciganek rhythm) may be observed during wakefulness or drowsiness. The frequency is 4-7 Hz, and the location is midline (ie, vertex). The morphology is rhythmic, smooth, sinusoidal, arciform, spiky, or mu-like.


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