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. 2019 Feb 5;10:66. doi: 10.3389/fneur.2019.00066

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Copyright © 2019 Gorlova, Ichiba, Nishimaru, Takamura, Matsumoto, Hori, Nagashima, Tatsuse, Ono and Nishijo.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Parameters correlated with total power during the initial phase of sleep (Ln TP_0–30 min). (A) Correlation with the stageN3 duration in sleep cycle 1 (stageN3 duration in cycle 1). (B) Correlation with the mean difference distal-proximal gradient (dDPG) from 30 to 250 min after sleep onset (dDPG_30–250 min). (C) Correlation with the mean natural-log transformed ultra-slow power (Ln US) from 30 to 65 min after sleep onset (Ln US_30–65 min). (D) Correlation with the mean Ln US in sleep cycle 1 (Ln US_cycle1). (E) Correlation with the mean natural-log transformed delta power (Ln Delta) from 30 to 65 min after sleep onset (Ln Delta_30–65 min). (F) Correlation with the mean Ln Delta in sleep cycle 1 (Ln Delta_cycle1).