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Related Experiment Videos

Olfactory function after mild traumatic brain injury.

J R de Kruijk1, P Leffers, P P C A Menheere

  • 1Department of Neurology, University Hospital Maastricht, The Netherlands. jdk@sneu.azm.nl

Brain Injury
|January 10, 2003
PubMed
Summary
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Olfactory dysfunction is common after mild traumatic brain injury (MTBI), affecting over a quarter of patients. However, this study found no link between smell loss and early injury markers.

Area of Science:

  • Neuroscience
  • Otolaryngology

Background:

  • Mild traumatic brain injury (MTBI) can affect brain regions involved in smell.
  • Prospective studies on olfactory dysfunction post-MTBI are lacking.

Purpose of the Study:

  • To determine the incidence of olfactory dysfunction following MTBI.
  • To investigate correlations between olfactory dysfunction and acute MTBI parameters.

Main Methods:

  • Prospective study of 111 patients with first-time MTBI.
  • Olfactory threshold testing conducted 2 weeks post-trauma.
  • Multiple linear regression analysis used to assess associations with symptoms and biomarkers (S-100B, NSE), adjusting for age.

Main Results:

  • 22% of patients experienced hyposmia (reduced smell ability) and 4% anosmia (complete smell loss).

Related Experiment Videos

  • No significant association was found between olfactory thresholds at 2 weeks and ER symptoms.
  • Early S-100B and NSE concentrations did not correlate with olfactory dysfunction.

    • Conclusions:

    • Olfactory dysfunction is prevalent after MTBI.
    • No correlation was identified between olfactory dysfunction and acute MTBI indicators such as symptoms or specific biomarkers.