File:Alertness circadian.jpg

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Tools : Sleep Chart : Alertness (C) showing the powerfully biphasic nature of the human circadian cycle.

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	Date/Time	Dimensions	User	Comment
current	09:59, 3 April 2016	1,592 × 988 (181 KB)	SuperMemoHelp (talk \| contribs)
	04:38, 12 October 2013	1,017 × 710 (112 KB)	SuperMemoHelp (talk \| contribs)	Alertness (C) from Good Sleep, Good Learning, Good Life
	09:19, 4 July 2011	1,059 × 799 (132 KB)	SuperMemoHelp (talk \| contribs)	Tools : Sleep Chart : Alertness (C) showing the powerfully biphasic nature of the human circadian cycle.

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