Single-Channel EEG Analysis - Quantitative EEG Analysis Methods and Clinical Applications - page 102

1500

1000

500

SGI of Shannon TDE

0

1 2 3 4 5 6 7

q

Figure 3.37 Spike gain improvement by Shannon entropy and Tsallis entropy with different q .

where M sig and S sig are corresponding to the mean and standard deviation of the
background signal (sig), respectively; and P v represents the amplitude of the tran-
sient spiky components. SGI indicates the significance level of the “spike” compo-
nent over the background “slow waves.” By applying the SGI to both raw EEGs and
TDEs in Figure 3.36 under different entropic indexes q , we are able to obtain the
influence of q on the SGI. Figure 3.37 clearly shows the monotonic change of SGI
with the increase of entropic index q .

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