Structural Correlates of Taste and Smell Loss in Encephalitis Disseminata Olfactory System and Multiple Sclerosis
2011

Olfactory Dysfunction in Multiple Sclerosis Patients

Sample size: 34 publication Evidence: moderate

Author Information

Author(s): Schmidt Felix Alexander, Goktas Onder, Harms Lutz, Bohner Georg, Erb Katharina, Dahlslett Bettina, Fleiner Franca

Primary Institution: Charité Campus Mitte, University of Berlin, Germany

Hypothesis

The study aims to explore reasons for and optimize the detection of olfactory dysfunction in MS patients using MRI.

Conclusion

The correlation between a higher number and volume of MS lesions with a decreased olfactory bulb and brain volume could help to explain olfactory dysfunction.

Supporting Evidence

  • 41% of MS patients displayed olfactory dysfunction compared to 8% of the control group.
  • There was a correlation between olfactory bulb volume and the number and volume of MS lesions.
  • Olfactory brain volume correlated with the volume of lesions in the olfactory brain and the EDSS score.

Takeaway

This study found that many people with multiple sclerosis have trouble smelling, and this might be linked to changes in their brain caused by the disease.

Methodology

The study assessed olfactory bulb and brain volume in MS patients using MRI and correlated these with olfactory and gustatory function tests.

Potential Biases

Potential selection bias due to exclusion criteria and the specific patient population.

Limitations

The study had a small sample size and was limited to a single center.

Participant Demographics

34 MS patients (24 women, 10 men, ages 22-65, mean age 41 years).

Statistical Information

P-Value

p<0.05

Statistical Significance

p<0.05

Digital Object Identifier (DOI)

10.1371/journal.pone.0019702

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