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. Author manuscript; available in PMC: 2021 Dec 1.
Published in final edited form as: Anesth Analg. 2020 Dec;131(6):1923–1933. doi: 10.1213/ANE.0000000000005220

Figure 1:

Figure 1:

A healthy 12-year old child in natural, physiologic, unanesthetized sleep records a decline in BIS into the mid-20s. No burst suppression is seen. The low BIS scores seen during physiological sleep are remarkable, and the suppression ratio of zero calls into question the posited linear relationship between burst suppression and BIS scores below 50.