Fig. 3: Estimating the arrow of time in brain signals provides significantly different signatures of brain state. | Communications Biology

Fig. 3: Estimating the arrow of time in brain signals provides significantly different signatures of brain state.

From: The INSIDEOUT framework provides precise signatures of the balance of intrinsic and extrinsic dynamics in brain states

Fig. 3

The figure summarises the results of analysing all the available (eyes closed) data from the non-human primates in sleep and four different states of anaesthesia (see Methods and Fig. 2). a The column shows individual examples of the functional connectivity matrices across the 128 electrodes and a scatter plot of the correlation between each condition. As can be seen, this conventional method is unable to distinguish between the very different brain states. b In contrast, the central panel shows the application of the thermodynamic framework of estimating the arrow of time on the same individual time series, which is clearly distinguishing brain states. c The column shows the significant group level results (across all non-human primates with all sessions belonging to the specific brain state) which provides a clear signature able to distinguish between different brain states (Wilcoxon rank-sum, p < 0.001).

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