What are rhythmic midline theta EEG variants?

Updated: Oct 09, 2019
  • Author: Roy Sucholeiki, MD; Chief Editor: Selim R Benbadis, MD  more...
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Answer

Rhythmic midline theta

  • This is a focal rhythm maximal at the midline, most prominently at Cz, which occasionally may spread to adjacent electrodes. It has a frequency of 5-7 Hz and typically has an arciform, spiky, mulike appearance. It waxes and wanes, can appear during wakefulness or drowsiness, and is usually reactive to eye opening or limb movement. Although initially described in association with temporal lobe epilepsy, it probably represents a normal variant. [7]


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