Computational and Mathematical Methods in Medicine

Research Article

A Wavelet Transform Based Method to Determine Depth of Anesthesia to Prevent Awareness during General Anesthesia

Figure 2

Different signals obtained during the calculation of entropy for low BIS epoch. In this epoch, BIS indices are lower than 30 and is about 25.
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(a) Typical epoch of recorded EEG
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(b) BIS of recorded epoch
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(c) Absolute of alpha band signal
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(d) of (1-2) Hz delta subband
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(e) of (2-3) Hz delta subband
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(f) of (3-4) Hz delta subband
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(g) of (1-2) Hz delta subband
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(h) of (2-3) Hz delta subband
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(i) of (3-4) Hz delta subband
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(j) MS of (1-2) Hz delta subband
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(k) MS of (2-3) Hz delta subband
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(l) MS of (3-4) Hz delta subband
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(m) Histogram of MS of (1-2) Hz delta subband
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(n) Histogram of MS of (2-3) Hz delta subband
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(o) Histogram of MS of (3-4) Hz delta subband