- Olfactory and Gustatory Function in Early-Stage Parkinson’s Disease: Implications for Cognitive Association
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Jeongjae Lee, Young Eun Kim, Joong Seob Lee, Suk Yun Kang, Min Seung Kim, In Hee Kwak, Jaeseol Park, Jung Yeon Nam, Hyeo-il Ma
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J Mov Disord. 2024;17(4):450-452. Published online June 27, 2024
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DOI: https://doi.org/10.14802/jmd.23243
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- Comparative Olfactory Profiles in Parkinson’s Disease and Drug-Induced Parkinsonism
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In Hee Kwak, Young Eun Kim, Suk Yun Kang, Joong Seob Lee, Jeongjae Lee, Min Seung Kim, Dong A Yea, Hyeo-il Ma
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J Mov Disord. 2024;17(1):64-70. Published online October 6, 2023
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DOI: https://doi.org/10.14802/jmd.23105
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 Abstract
PDFSupplementary Material
- Objective
Drug-induced parkinsonism (DIP) is a frequently encountered diagnostic possibility when considering Parkinson’s disease (PD). While olfactory dysfunction is a common clinical feature in PD, the comparison of olfactory function between the two conditions remains insufficient. This study aimed to compare olfactory function, including threshold, discrimination, and identification (TDI) profiles, between PD and DIP.
Methods
Consecutive patients with drug-naïve PD (n = 78) or DIP (n = 31) confirmed through dopamine transporter imaging were enrolled in this study. The YSK olfactory function (YOF) test, composed of TDI domains culturally familiar odorants to Koreans, was administered to all patients.
Results
In the study population, patients with DIP were significantly older than patients with PD. Over 70% of patients in each group had hyposmia or anosmia, and there was no significant difference in the occurrence of olfactory dysfunction between the two groups. In addition, there were no differences in the total YOF score and threshold score between the two groups. Meanwhile, the PD group had a significantly lower discrimination and identification score than the DIP group after adjusting for age, sex, the existence of diabetes, disease duration, and cognitive function.
Conclusion
This study demonstrated that detailed olfactory profiles are different in PD and DIP, even though olfactory dysfunction can be observed in both conditions.
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Citations
Citations to this article as recorded by  - Olfactory dysfunction as potential biomarker in neurodegenerative diseases: a narrative review
Nicolas De Cleene, Katarína Schwarzová, Samuel Labrecque, Clancy Cerejo, Atbin Djamshidian, Klaus Seppi, Beatrice Heim
Frontiers in Neuroscience.2025;[Epub] CrossRef
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