Andrew Huberman· PhD
those cells respond best to the blue yellow contrast present in the rising and setting sun, so-called low solar angle sun, also discussed in the previous episode.
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The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
those cells respond best to the blue yellow contrast present in the rising and setting sun, so-called low solar angle sun, also discussed in the previous episode.
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But those cells adjust their sensitivity such that they will not activate the triggers in the brain that convey daytime signals when they view moonlight, even a full moon, a really bright moon, or fire, because we talked about just how crucial it is to avoid bright lights between the hours of about 10:00 PM and 4:00 AM, except when you need to view things for sake of safety or work and so forth.
the neurons that that handle this are the so-called melanops and intrinsically photosensitive ganglion cells
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