Anyone else sneeze when the sun hits them?
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12-08-2012, 09:56 PM
Anyone else sneeze when the sun hits them?
Apparently, I'm not alone. About a third of the population sneezes when first getting hit with sunlight. It's called the "photic sneeze reflex" and the article can be read here. I've always kind of thought it was the revealing of all the dust particles floating around that triggered me to sneeze.

http://www.scientificamerican.com/articl...r-a-sneeze


"Have you ever emerged from a matinee movie, squinted into the sudden burst of sunlight and sneezed uncontrollably? Up to a third of the population will answer this question with an emphatic "Yes!" (whereas nearly everyone else scratches their head in confusion). Sneezing as the result of being exposed to a bright light—known as the photic sneeze reflex —is a genetic quirk that is still unexplained by science, even though it has intrigued some of history's greatest minds.

Aristotle mused about why one sneezes more after looking at the sun in The Book of Problems: "Why does the heat of the sun provoke sneezing?" He surmised that the heat of the sun on the nose was probably responsible.

Some 2 ,000 years later, in the early 17th century, English philosopher Francis Bacon neatly refuted that idea by stepping into the sun with his eyes closed—the heat was still there, but the sneeze was not (a compact demonstration of the fledgling scientific method). Bacon's best guess was that the sun's light made the eyes water, and then that moisture ("braine humour," literally) seeped into and irritated the nose.

Humours aside, Bacon's moisture hypothesis seemed quite reasonable until our modern understanding of physiology made it clear that the sneeze happens too quickly after light exposure to be the result of the comparatively sluggish tear ducts. So neurology steps in: Most experts now agree that crossed wires in the brain are probably responsible for the photic sneeze reflex.

A sneeze is usually triggered by an irritation in the nose, which is sensed by the trigeminal nerve, a cranial nerve responsible for facial sensation and motor control. This nerve is in close proximity to the optic nerve, which senses, for example, a sudden flood of light entering the retina. As the optic nerve fires to signal the brain to constrict the pupils, the theory goes, some of the electrical signal is sensed by the trigeminal nerve and mistaken by the brain as an irritant in the nose. Hence, a sneeze.

But because this harmless (albeit potentially embarrassing) phenomenon doesn't seem to be linked with any other medical condition, scientific study of the subject has been scarce. Research has done little more than document its existence and attempt to gauge its prevalence. No rigorous studies exist, but informal surveys peg 10 to 35 percent of the population as photic sneezers. A study in the 1960s showed that the trait is autosomal-dominant—the gene is neither on the X nor Y chromosome and only one copy of the gene has to be present for the trait to be expressed—so if one parent sneezes when they look at a bright light, about half of his or her children will, too.

The genetic culprit remains unidentified, but scientists are starting to take an interest in trying to find out. "I think it's worth doing," says Louis Ptácek , a neurologist at the University of California, San Francisco, and an investigator at the Howard Hughes Medical Institute. Ptácek studies episodic disorders such as epilepsy and migraine headaches, and he believes that investigating the photic sneeze reflex could shed light on their related neurology.

Epileptic seizures are sometimes triggered by flashing lights and migraine headaches are often accompanied by photophobia. "If we could find a gene that causes photic sneezing, we could study that gene and we might learn something about the visual pathway and some of these other reflex phenomena," Ptácek says."

"Ain't got no last words to say, yellow streak right up my spine. The gun in my mouth was real and the taste blew my mind."

"We see you cry. We turn your head. Then we slap your face. We see you try. We see you fail. Some things never change."
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12-08-2012, 10:27 PM
RE: Anyone else sneeze when the sun hits them?
No, but I start coughing if I fall asleep on a hot day with a fan turned on me. Think that means anything? Huh

It was just a fucking apple man, we're sorry okay? Please stop the madness Laugh out load
~Izel
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12-08-2012, 10:27 PM
RE: Anyone else sneeze when the sun hits them?
I don't have 'photic sneeze reflex' but if I feel a sneeze is imminent I can quicken it's arrival by looking into a bright light source. Can be helpful at times...

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12-08-2012, 10:50 PM
RE: Anyone else sneeze when the sun hits them?
(12-08-2012 10:27 PM)Erxomai Wrote:  No, but I start coughing if I fall asleep on a hot day with a fan turned on me. Think that means anything? Huh

I read that wrong. I read "I'll start coughing on a hot day if a fan turns me on." And let's just say that for a brief second, I started looking at you differently.



(12-08-2012 10:27 PM)aurora Wrote:  I don't have 'photic sneeze reflex' but if I feel a sneeze is imminent I can quicken it's arrival by looking into a bright light source. Can be helpful at times...

Then next time, you should try sticking your head into a raging fireplace. Should make the sneeze pretty much instant.

"Ain't got no last words to say, yellow streak right up my spine. The gun in my mouth was real and the taste blew my mind."

"We see you cry. We turn your head. Then we slap your face. We see you try. We see you fail. Some things never change."
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12-08-2012, 10:52 PM
RE: Anyone else sneeze when the sun hits them?
(12-08-2012 10:27 PM)Erxomai Wrote:  No, but I start coughing if I fall asleep on a hot day with a fan turned on me. Think that means anything? Huh

Yes, dry eosophagus disorder! Nah, just foolin' with ya! But it would defo dry out your tubes...

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12-08-2012, 10:55 PM
RE: Anyone else sneeze when the sun hits them?
(12-08-2012 10:50 PM)Buddy Christ Wrote:  
(12-08-2012 10:27 PM)Erxomai Wrote:  No, but I start coughing if I fall asleep on a hot day with a fan turned on me. Think that means anything? Huh

I read that wrong. I read "I'll start coughing on a hot day if a fan turns me on." And let's just say that for a brief second, I started looking at you differently.



(12-08-2012 10:27 PM)aurora Wrote:  I don't have 'photic sneeze reflex' but if I feel a sneeze is imminent I can quicken it's arrival by looking into a bright light source. Can be helpful at times...

Then next time, you should try sticking your head into a raging fireplace. Should make the sneeze pretty much instant.

Oooooo, Buddy likes Erxy!

Hell yeh, a sneeze and death at the same time. Fucking awesome!

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12-08-2012, 10:58 PM
RE: Anyone else sneeze when the sun hits them?
(12-08-2012 10:55 PM)aurora Wrote:  
(12-08-2012 10:50 PM)Buddy Christ Wrote:  I read that wrong. I read "I'll start coughing on a hot day if a fan turns me on." And let's just say that for a brief second, I started looking at you differently.




Then next time, you should try sticking your head into a raging fireplace. Should make the sneeze pretty much instant.

Oooooo, Buddy likes Erxy!

Hell yeh, a sneeze and death at the same time. Fucking awesome!

I'm almost flattered. No

It was just a fucking apple man, we're sorry okay? Please stop the madness Laugh out load
~Izel
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12-08-2012, 11:13 PM
RE: Anyone else sneeze when the sun hits them?
If I had a fetish where I use fans on hot days for sexual stimulation, perhaps I would be able to see a homo future, but alas I am only aroused these days by taking frozen chocolate bunnies from Easter and inserting them anally whilst watching reruns of Columbo.

This whole thread is worthless, by the way. We all know the reason humans sneeze is because pixies working for God are in our brains, slowly shoveling out pieces of our soul until we die, and the soul dust gets caught in our nose hairs, hence all the "God Bless You" business to return some of the dust and give us a bit more time to live. (Sad how I tried to make that up to be silly and parts of it are actually believed)

"Ain't got no last words to say, yellow streak right up my spine. The gun in my mouth was real and the taste blew my mind."

"We see you cry. We turn your head. Then we slap your face. We see you try. We see you fail. Some things never change."
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12-08-2012, 11:32 PM
RE: Anyone else sneeze when the sun hits them?
(12-08-2012 09:56 PM)Buddy Christ Wrote:  Ptácek studies episodic disorders such as epilepsy and migraine headaches, and he believes that investigating the photic sneeze reflex could shed light on their related neurology.

Epileptic seizures are sometimes triggered by flashing lights and migraine headaches are often accompanied by photophobia. "If we could find a gene that causes photic sneezing, we could study that gene and we might learn something about the visual pathway and some of these other reflex phenomena," Ptácek says."

This is interesting to me. I have had migraines in which I do not experience pain, rather flashing lights... and kind of a dull nausea.

But no - no sneezing at Aten. Thumbsup

A new type of thinking is essential if mankind is to survive and move to higher levels. ~ Albert Einstein
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12-08-2012, 11:54 PM
RE: Anyone else sneeze when the sun hits them?
(12-08-2012 11:32 PM)kim Wrote:  
(12-08-2012 09:56 PM)Buddy Christ Wrote:  Ptácek studies episodic disorders such as epilepsy and migraine headaches, and he believes that investigating the photic sneeze reflex could shed light on their related neurology.

Epileptic seizures are sometimes triggered by flashing lights and migraine headaches are often accompanied by photophobia. "If we could find a gene that causes photic sneezing, we could study that gene and we might learn something about the visual pathway and some of these other reflex phenomena," Ptácek says."

This is interesting to me. I have had migraines in which I do not experience pain, rather flashing lights... and kind of a dull nausea.

Are you sure you're not just describing your first marriage?

It was just a fucking apple man, we're sorry okay? Please stop the madness Laugh out load
~Izel
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