Effects of fragrance administration on stress-induced prefrontal cortex activity and sebum secretion in the facial skin

Tanida, Masahiro; Katsuyama, Masako; Sakatani, Kaoru

doi:10.1016/j.neulet.2007.12.014

Cited by 49 publications

(51 citation statements)

References 35 publications

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“…Although blood oxygenation changes in the extracranial tissues could affect the oxy-Hb changes, it would be difficult to explain the relation between asymmetry of the oxy-Hb changes (LIR) and STAI scores only in terms of the extracranial factor. In addition, Tanida et al 18 observed minimal changes in the skin blood flow during mental arithmetic tasks using a thermograph. However, further studies are necessary to clarify whether these effects might have significantly influenced the present NIRS data.…”

Section: Discussionmentioning

confidence: 99%

Correlation between asymmetry of spontaneous oscillation of hemodynamic changes in the prefrontal cortex and anxiety levels: a near-infrared spectroscopy study

et al. 2014

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Abstract. According to the valence asymmetry hypothesis, the left/right asymmetry of prefrontal cortex (PFC) activity is correlated with specific emotional responses to mental stress and personality traits. Here, we evaluated the relation between emotional state and asymmetry in PFC activity at rest by using near-infrared spectroscopy (NIRS). We measured spontaneous oscillation of oxyhemoglobin (oxy-Hb) concentrations in the bilateral PFC at rest in normal adults employing two-channel NIRS. In order to analyze left/right asymmetry of PFC activity at rest, we calculated the laterality index at rest (LIR) (see text). We investigated the correlation between the LIR and anxiety levels evaluated by the State-Trait Anxiety Inventory (STAI) test. We found that the right PFC was more active at rest than the left PFC, corresponding to a higher anxiety level measured by the STAI; that is, subjects with right-dominant activity at rest showed higher STAI scores, while those with leftdominant oxy-Hb changes at rest showed lower STAI scores. Aging had no significant effect on the relation. The present results obtained by NIRS are consistent with the valence asymmetry hypothesis. We emphasize NIRS may be a useful tool for objective assessment of anxiety levels.

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Section: Discussionmentioning

confidence: 99%

Correlation between asymmetry of spontaneous oscillation of hemodynamic changes in the prefrontal cortex and anxiety levels: a near-infrared spectroscopy study

et al. 2014

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“…A functional MRI study revealed that right dominance of PFC activity during mental stress tasks correlated with changes in heart rate [5]. In addition, our near infrared spectroscopy (NIRS) studies have demonstrated that the right PFC activity predominantly modulates sympathetic effects during a mental stress task [6][7][8]. However, it is not yet clear whether the PFC is involved in modulation of ANS function by acupuncture, and whether the laterality of the PFC activity plays a role in regulation of the ANS by acupuncture.…”

Section: Introductionmentioning

confidence: 92%

Effects of Acupuncture on Autonomic Nervous Function and Prefrontal Cortex Activity

Sakatani

Kitagawa

Aoyama

et al. 2009

Advances in Experimental Medicine and Biology

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Acupuncture is helpful in treating various diseases, including autonomic nervous system (ANS) dysfunction caused by mental stress. On the other hand, the frontal lobe is suggested to play an important role in stress responses by modulating the ANS. The aim of the study was to evaluate the effects of acupuncture on ANS and frontal lobe activities. We investigated 18 normal adults. We measured the activity of prefrontal cortex (PFC) caused by real acupuncture (WHO-LI4) and sham acupuncture, employing optical topography. To evaluate ANS function, we analyzed heart rate variability (HRV). Analysis of HRV revealed a decrease of the LF/HF ratio, and an increase of the HF power by real acupuncture, indicating a shift to parasympathetic dominancy. Acupuncture also caused cerebral blood oxygenation changes in both directions, that is, an increase and/or a decrease of oxyhemoglobin (Oxy-Hb) in the bilateral PFC. However, the Oxy-Hb change was not correlated with HRV parameters in the majority of cases. One of the possible explanations of the poor correlations might be that the PFC activity induced by acupuncture is not closely linked with ANS function.

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“…In order to investigate asymmetrical activation of the PFC, we first calculated a laterality index (right -left)/(right + left) [20] . However, 6 subjects (27%) showed deactivation in both hemispheres.…”

Section: Data Analysis and Statisticsmentioning

confidence: 99%

Hemodynamic Changes in the Prefrontal Cortex during Digit Span Task: A Near-Infrared Spectroscopy Study

et al. 2010

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Background/Aims: In this study, we examined changes in the concentrations of oxygenated and deoxygenated hemoglobin (oxy- and deoxy-Hb, respectively) in the prefrontal cortex (PFC) during the digit span task by using near-infrared spectroscopy (NIRS). Methods: The digit span task consists of the digit span forward and backward tasks. The tasks were performed by 22 healthy undergraduate students who participated in this study. Differences in the mean concentrations of oxy-Hb and deoxy-Hb between the baseline and task intervals were evaluated. Results: In digit span backward, oxy-Hb was significantly higher during the task interval than during the baseline. Further, deoxy-Hb was significantly lower during the task interval than during the baseline in both digit span forward and digit span backward. Digit span forward performance was significantly higher for the right-PFC-dominant group than for the left-PFC-dominant group. Conclusion: These results suggest that the digit span backward task is more demanding and requires greater activation of the prefrontal cortex than the digit span forward task. Our NIRS findings suggest that the digit span backward task involves executive functioning.

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Effects of fragrance administration on stress-induced prefrontal cortex activity and sebum secretion in the facial skin

Cited by 49 publications

References 35 publications

Correlation between asymmetry of spontaneous oscillation of hemodynamic changes in the prefrontal cortex and anxiety levels: a near-infrared spectroscopy study

Correlation between asymmetry of spontaneous oscillation of hemodynamic changes in the prefrontal cortex and anxiety levels: a near-infrared spectroscopy study

Effects of Acupuncture on Autonomic Nervous Function and Prefrontal Cortex Activity

Hemodynamic Changes in the Prefrontal Cortex during Digit Span Task: A Near-Infrared Spectroscopy Study

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