| چکيده
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Despite the extensive research conducted on the impact of aromatherapy on brain waves and human performance, there remains a lack of evidence regarding the efficacy of widely utilized plants such as myrtle and bay leaves in the medical, pharmaceutical, food, and cosmetic industries on the EEG activity of the human brain. This study aims to present the initial empirical evidence supporting the influence of inhaling these scents on mental fatigue, as measured by EEG, in a sample of healthy individuals.In this research, a group of twenty young individuals, consisting of 10 males and 10 females, engaged in a keyboard-based task for a duration of 75 minutes across three distinct conditions (unscented, scented bay leaves, and scented myrtle) on separate days, while maintaining consistent environmental conditions (humidity and temperature). The study aimed to examine the onset of mental fatigue in the participants by assessing performance metrics related to typing behavior, monitoring EEG activity during the task, and administering the Karolinska Sleepiness Scale (KSS) questionnaire at the commencement and conclusion of each session.The findings indicated that the act of inhaling fragrances was linked to a reduction in theta power, an improvement in typing precision and velocity, and a respective decrease of 22.46% and 8.01% in KSS scores when participants were exposed to the scents of Laurus nobilis and Myrtus in comparison to an environment without any odor.Hence, the utilization of bay leaf and Myrtus scents proved to be efficacious in enhancing keyboard-based task performance and mitigating the onset of cognitive fatigue. The findings of this study hold potential for enhancing workforce productivity across diverse occupational settings.Keywords: KSS, Mental Fatigue, Myrtus, Laurus nobilis, EEG, Aroma Therapy, Typewriting, Essential oil
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