e/Free-running sleep

Information
has gloss	eng: Free-running sleep experiments can involve any organism which sleeps. Freerunning sleep is sleep which is not adjusted, entrained, to the 24-hour cycle in nature nor to any artificial cycle. Such experiments are used in the study of circadian and other rhythms in biology. Subjects are shielded from all time cues, often by a constant light protocol, by a constant dark protocol or by the use of light/dark conditions to which the organism cannot entrain such as the ultrashort protocol of one hour dark and two hours light. Also, limited amounts of food can be made available at short intervals so as to avoid entrainment to mealtimes. Subjects are thus forced to live by their internal circadian "clocks".
has gloss	eng: Freerunning sleep can be sleep which is not adjusted, entrained, to the 24-hour cycle in nature. Sleep which is entrained to 24 hours but is not artificially regulated by alarm clocks etc. can also be called freerunning sleep.
lexicalization	eng: free-running sleep
lexicalization	eng: Freerunning sleep
instance of	(noun) a daily cycle of activity observed in many living organisms circadian rhythm