Brains On! Science podcast for kids

Why does the sun make some people sneeze?

May 12, 2015
Exploring the mystery of why the sun makes some people sneeze, including a genetic reflex. Interesting facts about the sun's size and temperature are shared, along with the potential implications of the sneeze reflex, including connections to seizures.
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ANECDOTE

Kids Describe Sun-Induced Sneezes

  • Listeners Caitlin (9) and Megan (7) describe sneezing when they glance at the sunny sky after coming outside.
  • Their experience mirrors Aristotle's question asked over 2,300 years ago, showing the phenomenon's long-known nature.
INSIGHT

Photic Sneeze Reflex Explained

  • Photic sneeze reflex makes bright light trigger sneezes without nasal irritants.
  • Dr. Louis Patatich explains it may be an abnormal reflex where light activates brainstem sneeze circuits in about 10% of people.
INSIGHT

Photic Sneeze Runs In Families

  • Photic sneeze reflex appears hereditary, with affected people often noticing family members also sneeze from bright light.
  • Roughly 10% of the population has the trait and many think 'doesn't everybody do that?'.
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