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[Olfactory function in patients with mild cognitive impairment].

Wei Hang1, Gang Liu2, Tong Han

  • 1Department of Otorhinolaryngology Head and Neck Surgery, Tianjin Huanhu Hospital, Tianjin 300060, China.

Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi = Chinese Journal of Otorhinolaryngology Head and Neck Surgery
|December 10, 2014
PubMed
Summary
This summary is machine-generated.

Mild cognitive impairment (MCI) patients exhibit reduced olfactory bulb (OB) volumes, correlating with olfactory dysfunction. This olfactory loss may serve as an early diagnostic indicator for MCI.

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Area of Science:

  • Neuroscience
  • Radiology
  • Gerontology

Background:

  • Mild cognitive impairment (MCI) is a transitional stage between normal aging and dementia.
  • Olfactory dysfunction is increasingly recognized as a potential early marker for neurodegenerative diseases.

Purpose of the Study:

  • To investigate the relationship between olfactory bulb (OB) volume, olfactory sulcus (OS) depth, and olfactory function in individuals with MCI.
  • To determine if OB volume and OS depth can serve as objective biomarkers for MCI.

Main Methods:

  • Magnetic resonance imaging (MRI) was used to measure OB volume and OS depth in 50 MCI patients and 50 controls.
  • Olfactory function was assessed using T&T olfactory testing.
  • Statistical analysis was performed using SPSS software.

Main Results:

  • MCI patients demonstrated significantly lower OB volumes compared to controls (P < 0.01).
  • Olfactory function, specifically the olfactory discriminate threshold, was negatively correlated with OB volume (P < 0.05) and positively correlated with the degree of cognitive impairment in MCI patients (P < 0.05).
  • No significant differences in OS depth were found between MCI patients and controls (P > 0.05), and OS depth did not correlate with olfactory function.

Conclusions:

  • Reduced OB volume is a characteristic finding in MCI patients and is associated with impaired olfactory function.
  • Olfactory dysfunction, linked to decreased OB volume, may represent an early and objective diagnostic indicator for MCI.
  • Olfactory sulcus depth is not a reliable indicator of olfactory function or MCI in this cohort.