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Precision Induction and Distinction of Coughing and Sneezing Reflexes in Mice
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Published on: October 3, 2025

On light-induced sneezing.

D Hydén1, S Arlinger

  • 1Department of Otorhinolaryngology, University Hospital, Linköping, Sweden. dag.hyden@lio.se

Eye (London, England)
|July 4, 2009
PubMed
Summary
This summary is machine-generated.

Researchers investigated the cause of tickling in the nose before a light-induced sneeze. No local electrical activity was found, suggesting light-induced sneezing is a central nervous system phenomenon.

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Area of Science:

  • Neuroscience
  • Ophthalmology

Background:

  • Light-induced sneezing, or photic sneeze reflex, is an inherited condition.
  • The exact mechanism triggering this reflex remains unclear.

Purpose of the Study:

  • To determine if the sensation of tickling in the nose preceding a light-induced sneeze correlates with measurable local electrical activity.
  • To investigate the neurological basis of the photic sneeze reflex.

Main Methods:

  • Seven healthy volunteers, including three with a history of photic sneeze reflex, were exposed to stroboscopic light or a halogen lamp.
  • Intranasal electrodes were used to record electrical activity, with measures taken to minimize retinal electrical interference.

Main Results:

  • No reproducible electrical activity was detected in the nasal passages of any participant during light stimulation.
  • The findings indicate a lack of local peripheral response correlating with the sneeze reflex.

Conclusions:

  • Light-induced sneezing is likely a central nervous system phenomenon.
  • The sensation of tickling is a referred sensation, originating from the trigeminal nucleus.
  • Genetic variations in the proximity of the superior colliculus to the mesencephalic trigeminal nucleus may explain familial and racial predispositions to this reflex.