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. 2021 Jun 23;8(6):201971. doi: 10.1098/rsos.201971

Table 4.

Results for the two ‘classical’ measures used to characterize the chaoticity and information content in time series: the permutation entropy and the Lyapunov exponent.

condition permutation entropy Lyapunov exponent
awake 4.27 ± 0.59 0.2 ± 0.013
ketamine 3.92 ± 0.58 0.18 ± 0.01
propofol 3.61 ± 0.61 0.16 ± 0.01