Sun sneezing reflex
Have you ever stepped outside on a sunny day only to be greeted by an uncontrollable sneeze? It's not just you—up to 35% of people experience this quirky bodily reaction known as the photic sneeze reflex. Also playfully referred to as the "ACHOO syndrome" (Autosomal Compelling Helio-Ophthalmic Outburst), this phenomenon has puzzled scientists and amused sunbathers for decades.
What is the Photic Sneeze Reflex?
The photic sneeze reflex is when exposure to bright light causes one to sneeze. This can happen when leaving a dimly lit building on a sunny day or suddenly facing bright headlights while driving at night. It's a reflexive response that occurs without warning, and for some, it can involve multiple sneezes in quick succession.
The Science Behind the Sneeze
But why does this happen? The leading theory involves a mix-up in the brain's wiring. Usually, the optic nerve, which perceives light entering the eyes, sends signals directly to the brain's visual cortex, where these signals are processed into images. However, these neural pathways might cross incorrectly for those with the photic sneeze reflex.
Researchers suggest that intense light stimulates the optic nerve accidentally triggering the trigeminal nerve, the main nerve involved in facial sensations and motor control, including the sneeze reflex. This miscommunication results in the sudden, "sunny" sneezes some people experience.
How Common Is It?
Estimates vary, but studies suggest that 18% and 35% of the population have this reflex. According to some genetic studies, it's more common in people of European descent, pointing to a hereditary component. The reflex can run in families, suggesting that if your parents sneeze when they look towards the sun, there's a higher chance you will, too.
Implications and Adjustments
While primarily a harmless curiosity, the photic sneeze reflex can pose challenges. For instance, sudden sneezing can be hazardous while driving or operating machinery under bright lights. Recognizing the potential for these sudden sneezes can help..
Full article is available on www.medicalartsshop.com
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