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RE: I think the conclusion goes a bit too far

Comment comment by Brandon on 14 November 2007

people naturally get a host of other cues that act as feedback on their circadian

I recall having heard the results of a study which stated when people are left without exposure to the day-night cycle, they begin to delay both sleeping and waking up - eventually falling into cycles much longer than 24 hrs. Looking online, however, I was unable to find anything of the sort.

I did find some interesting information on the Wikipedia Circadian Rhythm page - particularly concerning the criteria for a cycle to be considered a circadian rhythm, and the impact of the light-dark cycle.

I'd be interested in any further information or quality reading on the subject.

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RE: I think the conclusion goes a bit too far by scottb :: NR7 :: on 14 November 2007

I recall having heard the results of a study which stated when people are left without exposure to the day-night cycle, they begin to delay both sleeping and waking up - eventually falling into cycles much longer than 24 hrs.

I remember hearing something like this, too - though it's not "much" longer than 24h. As I recall, it averaged to something a bit over 24.5h - and I remember somebody using this to support an absurd argument that life originated on Mars (!), which has a 24.6h day.

I'd be interested in any further information or quality reading on the subject.

I'm working from memory on it, too.