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Out-of-phase Circadian Rhythms
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[QUOTE="BillTre, post: 6468511, member: 581757"] I used to work next door to a big circadian lab in grad school. A lot of what follows is from what I learned from hanging out with them. In fish labs, we would also manipulate and use the fish's circadian cycles to manipulate their breeding activity. There are a lot of circadan breeding interactions. Yearly cycle length changes signal seasonal changes which control breeding in some animals (and plants). [B]Yes[/B], it is possible to have a circadian cycle out of phase with the local light cycle. Its done all the time in lab experiments with animals. There are bright lights (usually emphasizing shorter wavelengths) that are sold for waking people up in the morning. You might want to try one of these in the morning (I use coffee!). If you want to reduce [B]your late night staying awake[/B], you can reduce light intensity and the shorter wavelengths which reduces the lights on signal to your circadian system. There is usually a lot of blue light in computer screens, etc. I have a thing on my computer in which i can set a schedule for the screen light to us less blue wavelengths at night. Weird fact: Its also possible to use a flash of light at a particular time during the dark period to throw the an animal into a "chaotic" wake-sleep cycle. Not done with people, to my knowledge. There are also mutant animals with different natural lengths of cycles. There are probably similar human mutants. If you have a cycle greater than 24 hours, interacting with a natural light cycle (brght blue light on at wake-up and off at bedtime) can reset your mutant length cycle to better match up with the ongoing light cycle you experience. This happens through light sensors in the retina, pineal, and perhaps other areas that operate together to regulate the wake-sleep cycle. I suspect night owls are people with longer than normal cycles, extending their wakefulness to later hours. (maybe I'm like that.) Me too. My son is also a night owl. When he was a baby, he was very difficult to get to go to sleep before mid-night. Probably another mutant. [/QUOTE]
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Out-of-phase Circadian Rhythms
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