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Originally Posted by Michael2Wolves
Scientists have found cave paintings in caves that have never seen any light whatsoever. Not even by fire. Only way to get to them is to swim a long distance underwater. These paintings are always of geometric lines and patterns. Anthropologists and psychologists have theorized that in pitch blackness like that, it acts as a sensory deprivation tank and causes auras, or "hallucinatory" geometric swirls and waves to appear (though I now begin to wonder if it's not more the pineal gland--the third eye--opening a bit when the noisy consciousness quiets down, allowing us to perceive deeper into reality?) in our visual cortex area. This has also been reproduced in said deprivation tanks under controlled conditions. This is not a new phenomenon.
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Auras... Please don't laud them because experiencing them SUCKS! (I get migraines with auras... As did Lewis Carroll, who, as commonly suggested, wrote "Alice in Wonderland" based off the auras he experienced.) Auras aren't just visual -- they can affect any of your senses. The worst aura I experienced involved losing half of my field of vision to sun spots (you know, like if you stare at the sun too long and then look down) and half of my fingers on one hand going numb.... I was in the middle of teaching a lesson but I somehow managed to completely hide from my kids that anything was wrong.
While there are different causes for auras, I can promise you that in the case of a migraine with aura, it does NOT allow you to see deeper into your consciousness. Mine are triggered by stress so it's definitely NOT my consciousness quieting down. It's more like it's overwhelmed and it becomes the blue computer screen of death in need of rebooting.
Quote:
Originally Posted by Michael2Wolves
Tell me, what evolutionary purpose is there in the amygdala being able to take over the visual cortex in the absolute absence of light to force such hallucinations to occur?
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IF YOU FIGURE OUT THE EVOLUTIONARY PURPOSE OF AURAS, PLEASE SHARE. Regardless of whether the aura is caused by an absence of light or as it relates to migraines, please share. I absolutely ABHOR these wretched things and I'd give my left leg to stop these freaking auras.