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. Author manuscript; available in PMC: 2021 Jul 31.
Published in final edited form as: Physiol Meas. 2018 Dec 21;39(12):124005. doi: 10.1088/1361-6579/aaf339

Figure 1:

Figure 1:

Examples of CRC spectrograms for each sleep state: (a) Wake; (b) REM sleep; (c) NREM light sleep; (d) NREM deep sleep. Hotter colors indicate higher cross spectral coherence (inherently normalized between 0 and 1)