Fig. 8

Distribution of feature space showing the discrimination between areas using the selected features listed in Table 4: a \({ACF}_{1/3}\), b \({ACF}_{2/3}\), c \({\mathrm{ACF}}_{1/3}\)/\({\mathrm{ACF}}_{2/3}\) , d NPks \({BP}_{2-8 Hz}\), e \({BP}_{5-20 Hz}\), f NPks_DFTmean, g NPks_DFTmed. Each normalized feature was obtained by dividing the feature value by the difference between the maximum and minimum value