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• W1973952189 endingPage "216" @default.
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• W1973952189 abstract "Although psychological stress affects skin condition, the neurophysiological mechanism involved is unclear. In this study, we evaluated the relationship between skin condition and left/right asymmetry in prefrontal cortex (PFC) activity during mental stress tasks since recent studies have suggested that the right PFC dominates the regulation of the stress response system, including the hypothalamic-pituitary-adrenal (HPA) axis. Using near-infrared spectroscopy, we measured hemoglobin concentration changes in the bilateral PFC during a mental arithmetic task in normal adults and evaluated the laterality scores (i.e., [(right-left)/(right+left)]) of oxyhemoglobin concentration changes. Elicitation of stress was verified by the State-Trait Anxiety Inventory (STAI) and heart rate. The sebum levels and Propionibacterium acnes populations in the facial skin were measured before the task. The task significantly increased the STAI-II scores (p=0.00079) and heart rate (p=0.0000049). The oxyhemoglobin concentration increased in the bilateral PFC during the task, associated with a decrease in deoxyhemoglobin concentration. The laterality scores of oxyhemoglobin concentration changes were positively correlated with sebum levels (r=+0.50, p=0.026) and P. acnes populations (r=+0.49, p=0.029) in the facial skin before the task. There was a significant positive correlation between heart rate changes and the laterality scores of oxyhemoglobin concentration changes (r=+0.54, p=0.015). These results demonstrate that the subjects with higher sebum levels and higher P. acnes populations in the facial skin have a right dominant PFC activity during a mental stress task and suggest that such subjects are sensitive to mental stress associated with hyperactivity of the stress response system, including the HPA axis system." @default.
• W1973952189 created "2016-06-24" @default.
• W1973952189 creator A5032934682 @default.
• W1973952189 creator A5042479528 @default.
• W1973952189 creator A5049826273 @default.
• W1973952189 date "2007-12-01" @default.
• W1973952189 modified "2023-10-15" @default.
• W1973952189 title "Relation between mental stress-induced prefrontal cortex activity and skin conditions: A near-infrared spectroscopy study" @default.
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• W1973952189 doi "https://doi.org/10.1016/j.brainres.2007.09.058" @default.
• W1973952189 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17950258" @default.
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