Abstract
The EEG basic or background activity is defined as the continuous sequence of waves that predominate in frequency and amplitude (8–16 leads). Classifying the usually recorded frequency range of 0.5–32 Hz into four frequency bands (Table 1) has proven useful in the visual evaluation of the conventional EEG. However, the lack of a sharp transition between the defined ranges frequently makes such an arbitrary division questionable, e.g., when the actual level of consciousness changes through various causes (Künkel 1980).
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Pichlmayr, I., Lips, U., Künkel, H. (1984). Initial Electroencephalographic Findings in Patients Undergoing Anesthesia. In: The Electroencephalogram in Anesthesia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-69562-9_4
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DOI: https://doi.org/10.1007/978-3-642-69562-9_4
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