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Related Experiment Videos

Loss of trigeminal sensitivity reduces olfactory function.

Alexander Husner1, Johannes Frasnelli, Antje Welge-Lüssen

  • 1Smell & Taste Clinic, Department of Otorhinolaryngology, University of Dresden Medical School ("Technische Universität Dresden"), Fetscherstrasse 74, 01307 Dresden, Germany.

The Laryngoscope
|August 4, 2006
PubMed
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Loss of trigeminal nerve function significantly impairs the sense of smell, impacting olfactory thresholds and neural responses. This highlights the crucial interaction between trigeminal and olfactory systems.

Area of Science:

  • Neuroscience
  • Sensory Physiology
  • Otorhinolaryngology

Background:

  • The trigeminal and olfactory nerves have overlapping nasal innervation and interactive functions.
  • Olfactory dysfunction is known to decrease trigeminal sensitivity.

Observation:

  • A patient with unilateral trigeminal nerve loss due to a meningioma was studied.
  • Olfactory stimulus thresholds were elevated 64-fold on the affected side.

Findings:

  • Disturbed trigeminal sensitivity markedly impacts olfactory function.
  • Event-related potential recordings showed reduced olfactory responses on the affected side.

Implications:

  • This case suggests trigeminal nerve function is essential for normal olfaction.

Related Experiment Videos

  • Understanding trigeminal-olfactory interaction is vital for diagnosing smell disorders.