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. 2023 Aug 24;47(1):zsad219. doi: 10.1093/sleep/zsad219

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© The Author(s) 2023. Published by Oxford University Press on behalf of Sleep Research Society.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 2. — Curve No.1 (Name: Zoya B. [girl]; Age: 1 month 15 days). Explanation for curve No. 1: the values from 20 to 50 on the vertical axis indicate the number of breaths per minute. The values at the top indicate minutes from sleep onset. Points (^.) = general movements. Dashes (::) = movements of eyelids and eyes. M = urination. Figure is from [Denisova, M. P. and Figurin, N. L. (1926). Periodic phenomena in the sleep of children. Novoe v refleksologii i fiziologii nervnoi sistemy, 2, 338–345]. This material is provided solely for scientific and educational uses.