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Related Experiment Videos

Olfactory dysfunction in schizophrenia: a qualitative and quantitative review.

P J Moberg1, R Agrin, R E Gur

  • 1Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, USA.

Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology
|August 24, 1999
PubMed
Summary

Patients with schizophrenia exhibit significant olfactory dysfunction across all tested domains, including identification, detection, discrimination, and memory. Factors like gender, smoking, and medication did not significantly alter these olfactory deficits.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Sensory Systems

Background:

  • Olfactory dysfunction is increasingly recognized in schizophrenia.
  • Previous research shows deficits in odor identification, detection, discrimination, and memory.
  • Controversy exists regarding differential deficits and influencing factors like gender, smoking, and medication.

Purpose of the Study:

  • To review the literature qualitatively and quantitatively (meta-analytically) on olfaction in schizophrenia.
  • To investigate potential differential deficits across olfactory domains.
  • To examine the influence of moderator variables (gender, smoking, medication) on olfactory measures.

Main Methods:

  • Qualitative and quantitative (meta-analytic) review of English language literature.

Related Experiment Videos

  • Analysis of studies examining olfactory function in schizophrenia patients.
  • Examination of moderator variables including gender, smoking status, and medication.

    • Main Results:

    • Substantial olfactory deficits were confirmed across all domains in schizophrenia patients.
    • No significant differential deficits were found between odor identification, detection, discrimination, and memory.
    • Gender, medication status, and smoking history did not significantly influence the observed effect sizes.

    Conclusions:

    • Schizophrenia is associated with primary dysfunction in the olfactory system.
    • These olfactory deficits correlate with reported structural and functional abnormalities in brain regions regulating olfaction.
    • The findings support a neurobiological basis for olfactory impairments in schizophrenia.