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Journal of Medical Signals and Sensors، جلد ۱۴، شماره ۴، صفحات ۱۲-۲۰۲۴
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عنوان انگلیسی Lavender Essential Oil Inhalation Improves Attentional Shifting and Accuracy: Evidence from Dynamic Changes of Cognitive Flexibility and Power Spectral Density of Electroencephalogram Signals
چکیده انگلیسی مقاله Background:  Cognitive flexibility, a vital component of executive function, entails the utilization of extended brain networks. Olfactory stimulation has been shown to influence various brain functions, particularly cognitive performance. Method:  To investigate aroma inhalation’s effects on brain activity dynamics associated with cognitive flexibility, 20 healthy adults were recruited to complete a set-shifting task during two experimental conditions: no aroma stimuli vs. lavender essential oil inhalation. Using Thomson’s multitaper approach, the normalized power spectral density (NPSD) was assessed for five frequency bands. Results:  Findings confirm that aroma inhalation significantly affects behavioral indices (i.e., reaction time (RT) and response accuracy) and electroencephalogram (EEG) signatures, especially in the frontal lobe. Participants showed a tremendous increase in theta and alpha NPSD, associated with relaxation, along with beta NPSD, associated with clear and fast thinking after inhaling the aroma. NPSD of the delta band, an indicator of the unconscious mind, significantly decreased when stimulated with lavender essential oil. Further, participants exhibited shorter RT and more accurate responses following aroma inhalation. Conclusion:  Our findings revealed significant changes in oscillatory power and behavioral performance after aroma inhalation, providing neural evidence that olfactory stimulation with lavender essential oil may facilitate cognitive flexibility.
کلیدواژه‌های انگلیسی مقاله Cognitive flexibility,electroencephalogram,lavender essential oil,power spectral density,task-switching paradigm
نویسندگان مقاله | Reyhaneh Afghan
Department of Cognitive Neuroscience, University of Tabriz, Tabriz, Iran


| Soomaayeh Heysieattalab
Department of Neurosciences and Cognition, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran


| Hamid Soltani Zangbar
Department of Neurosciences and Cognition, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran


| Abbas Ebrahimi-Kalan
Molecular Medicine Research Center, Department of Statistics and Epidemiology, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran


| Tohid Jafari-Koshki
Department of Biomedical Engineering, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran


| Nasser Samadzadehaghdam


نشانی اینترنتی http://jmss.mui.ac.ir/index.php/jmss/article/view/698
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Original Articles
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