This study compared the effects of two types of treatments (non-stimulation and lavender inhalation) on EEGs changes in the left and right frontal and central lobes during a 16-minute hypnotic sleep induction period, and sought to explore the brain me...
This study compared the effects of two types of treatments (non-stimulation and lavender inhalation) on EEGs changes in the left and right frontal and central lobes during a 16-minute hypnotic sleep induction period, and sought to explore the brain mechanism of action and usability of lavender essential oil. For this, 25 middle-aged women with low sleep quality, with an average age of 40~59, were subjected to two types of treatment at intervals of 3~5 days. The results of repeated measures ANOVA and t-test showed significant differences in theta waves, and the main results are as follows. First, the effect of lavender scent on EEG in the right frontal lobe and the left and right central lobes, excluding the left frontal lobe, was 8-12 minutes, and the increase in theta waves was greater as it went from 12 to 16 minutes. Second, coherence changes during lavender scent inhalation, compared to no stimulation, showed that the level of communication between the left and right prefrontal cortex increased from the 0 to 4 minute time point to the 12 to 16 minute time point, and decreased otherwise. Additionally, the relationship between the left frontal lobe and the left central lobe, and the right frontal lobe and the right central lobe showed the highest theta wave activity at the 0 to 4 minute point. These results may increase the potential utility of lavender by exploiting the brain mechanisms and temporal effects of scent in subjects with early sleep disorders.