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Footos3003 t1_isy9tsz wrote

Reply to comment by HoTChOcLa1E in Is our sleep pattern based off the length of the day? by ebb5

Humans inner clock is not exactly 24h (sometimes more sometimes less depending on the person) but it's influenced by external factors such as light, time of eating etc., so you always lock to 24h (it's also how your body can adapt to changing timezones).

If you leave someone long enough in a place without natural light or external points of reference, they will go back to their "inner" clock which is based on the actual fluctuation of circadian proteins and hormones

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Isopbc t1_isyfz4k wrote

> more sometimes less depending on the person) but it’s influenced by external factors such as light, time of eating etc., so you always lock to 24h

Just wanted to point out that a small percentage of people do not lock to 24h

Non24 sleep wake disorder is most commonly found in the blind, but some sighted people also suffer with it.

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desolation0 t1_isyekps wrote

Some biological cycles are easier to up regulate or down regulate so can be more adaptive for the baseline to err slightly in the direction that is easier to correct. Just let the outside stimulus do its magic to keep things sensible.

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