What are the EEG characteristics of the psychomotor epileptiform normal variant?

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

Answer

A more useful and descriptive term for psychomotor variant is rhythmic midtemporal theta of drowsiness (RMTD). The frequency is theta (4-7 Hz). The location is maximum midtemporal, unilateral or bilaterally independent or bisynchronous. The morphology typically is notched, flat-topped, or sharply contoured (see the image below). Bursts may last 1-10 seconds or longer and thus resemble temporal lobe seizures. The amplitude is medium to high. [15, 16]

Rhythmic midtemporal theta of drowsiness (psychomo Rhythmic midtemporal theta of drowsiness (psychomotor variant). Note seizurelike rhythmicity and notched morphology.

Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!