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5.5.4 Power Spectrum
The power is displayed in the power spectrum depending on the frequency. The
individual frequency bands are delimited from one another by vertical lines:
δ (delta band) : 0.5 – 3.5 Hz
θ (theta band) : 3.5 – 7.5 Hz
α (alpha band) : 7.5 – 12.5 Hz
β (beta band) : > 12.5 Hz
In the very deep stages E
2
, F
0
and F
1
, the power spectrum is shown in gray.
Fig. 11: Power Spectrum, 1-channel and 2-channel
5.5.5 DSA
The DSA (Density Spectral Array) is a color-coded representation of the frequency
components of an EEG (violet = low power values, red = high power values).
Fig. 12: DSA, 1-channel and 2-channel
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