Human sleep rhythm

Human Anatomy, Physiology, and Medicine. Anything human!

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Human sleep rhythm

Post by drnsmith » Sun Sep 10, 2006 5:06 am

I have recently read that the free-running period (FRP) for the 'daily' rhythms is close to 25.5 hours and that it is entrained by a circadian exogenous cue (day/night light/dark).

I am curious about the origin of the FRP and what the significance of a periodicity of greater than 24 hours might represent.


Darren Smith

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Re: Human sleep rhythm

Post by zami'87. » Tue Sep 19, 2006 7:31 pm

Well probably it was important to be aware of winter nights are longer(temperature can change quickly but lenght of night not)...believe that it affected on reproduction(maybe when the conditions are appropriate for raising offspring)
Every man is a star whose light can make shadows dance differently and change our view of landscape permanently***

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