Abstract
The general population shows accentuations of certain different frequency bands in the range of the EEG spectrum between 2 and 32 Hz. These “dominant frequencies” (DF) are expressed as a percentage of the overall activity. Most people, i.e. 75%–90%, have an alpha EEG (8–13 Hz), 3%–4% (28%–50% in old age) a beta EEG (16–25 Hz, sometimes up to 32 Hz), and 7%–8% a theta EEG (4–8 Hz). About 1% have an irregular EEG with mixed frequencies, and 4%–19% have a low-voltage or flat EEG without any classifiable dominant frequency (Figs. 5–9).
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© 1987 Springer-Verlag Berlin Heidelberg
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Pichlmayr, I., Lehmkuhl, P., Lips, U. (1987). Normal EEG Findings. In: EEG Atlas for Anesthesiologists. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-83161-4_4
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DOI: https://doi.org/10.1007/978-3-642-83161-4_4
Publisher Name: Springer, Berlin, Heidelberg
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