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Updated: Jul 17, 2026

An Olfactory Preference Test for Measuring Olfactory Hedonic Biases in Mouse Models of Depression
Published on: July 11, 2025
Reduced olfactory sensitivity in subjects with depressive symptoms
Olga Pollatos1, Jessica Albrecht, Rainer Kopietz
1Department of Neuroradiology, Ludwig-Maximilians-University of Munich, Germany. pollatos@psy.uni-muenchen.de
Depressive symptoms are linked to reduced olfactory sensitivity in healthy individuals. This suggests a potential connection between mood and the sense of smell, possibly involving brain regions like the amygdala.
Area of Science:
- Neuroscience
- Psychiatry
- Sensory Science
Background:
- Clinical studies indicate reduced olfactory sensitivity in major depression.
- The relationship between depressive symptoms and olfactory function in healthy individuals remains underexplored.
Purpose of the Study:
- To investigate the association between depressive symptoms and olfactory performance in healthy subjects.
- To assess olfactory threshold, discrimination, emotional arousal, and pleasantness in relation to depressive symptoms.
Main Methods:
- 48 healthy subjects (14 male) participated.
- Depressive symptoms were assessed using the Beck Depression Inventory.
- Olfactory threshold and discrimination were evaluated, alongside emotional responses to odors.
Main Results:
- A significant negative correlation was found between olfactory sensitivity and depressive symptoms.
- Olfactory discrimination performance did not show a significant relationship with depressive symptoms.
Conclusions:
- Depressive symptoms are associated with diminished olfactory sensitivity in healthy individuals.
- This relationship may involve functional alterations in brain areas like the amygdala and piriform cortex, consistent with known depression-related brain activity patterns.
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