Effects of olfactory stimulation with rose and orange oil on prefrontal cortex activity

Igarashi, Miho; Ikei, Harumi; Song, Chorong; Miyazaki, Y.

doi:10.1016/j.ctim.2014.09.003

Cited by 70 publications

(58 citation statements)

References 22 publications

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“…Other nature-derived olfactory stimuli [12][13][14] also reduce prefrontal cortex activity. Our present findings of air-dried wood chips are consistent with those of previous studies [10,[12][13][14].…”

Section: Resultsmentioning

confidence: 99%

“…Recent studies have focused on the physiological relaxing effects of nature-derived stimulation [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], and there are several reports on the effects of wood odor on humans [9][10][11]. Miyazaki et al [9] reported that inhalation of Taiwan hinoki oil odor decreases systolic blood pressure.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of the effects of olfactory stimulation by air-dried and high-temperature-dried wood chips of hinoki cypress (Chamaecyparis obtusa) on prefrontal cortex activity

et al. 2015

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of the effects of olfactory stimulation by air-dried and high-temperature-dried wood chips of hinoki cypress (Chamaecyparis obtusa) on prefrontal cortex activity

et al. 2015

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“…Previous studies have shown that natural environments or nature-derived stimuli, such as forests [36][37][38][39][40][41][42], urban parks [43][44][45], flowers [46][47][48][49][50], and foliage plants [51,52], induce physiological relaxation in humans. Wood is a familiar natural material which we have many opportunities to touch on a daily basis, and it is used for many household objects, such as interior materials of buildings and houses, furniture (desks and shelves), and stationery.…”

Section: Discussionmentioning

confidence: 99%

Physiological effects of touching hinoki cypress (Chamaecyparis obtusa)

2018

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This study aimed to clarify the physiological effects of touching hinoki cypress (hereinafter called "hinoki") (Chamaecyparis obtusa) wood with the palm of the right hand on brain activity and autonomic nervous activity. Twenty-two female university students (mean age 21.1 ± 0.2 years) participated in the study. As an indicator of brain activity, oxyhemoglobin (oxy-Hb) concentrations were measured in the left/right prefrontal cortex using near-infrared time-resolved spectroscopy. Heart rate variability (HRV) was used as an indicator of autonomic nervous activity. The high-frequency (HF) component of HRV, which reflected parasympathetic nervous activity, and the low-frequency (LF)/HF ratio, which reflected sympathetic nervous activity, were measured. Plate (300 × 300 mm) of uncoated hinoki was used as tactile stimulation. Marble was used as a control material. After sitting at rest with their eyes closed, the participants touched the materials for 90 s with their eyes still closed. The results showed that tactile stimulation with hinoki significantly decreased oxy-Hb concentration in the left prefrontal cortex and increased ln(HF) reflected parasympathetic nervous activity compared with marble. In conclusion, our study showed that touching hinoki wood with the palm calms prefrontal cortex activity and increases parasympathetic nervous activity, thereby inducing physiological relaxation.

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“…The physiological effects of olfactory stimulation with rose and orange essential oils were studied [48] in 20 female university students (average age: 22.5 years). The stimulus was the scent of the essential oils made from roses and orange zest.…”

Section: Physiological Effects Of Nature Therapymentioning

confidence: 99%

Physiological Effects of Nature Therapy: A Review of the Research in Japan

Song

Ikei

Miyazaki

2016

IJERPH

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Humans have evolved into what they are today after the passage of 6–7 million years. If we define the beginning of urbanization as the rise of the industrial revolution, less than 0.01% of our species’ history has been spent in modern surroundings. Humans have spent over 99.99% of their time living in the natural environment. The gap between the natural setting, for which our physiological functions are adapted, and the highly urbanized and artificial setting that we inhabit is a contributing cause of the “stress state” in modern people. In recent years, scientific evidence supporting the physiological effects of relaxation caused by natural stimuli has accumulated. This review aimed to objectively demonstrate the physiological effects of nature therapy. We have reviewed research in Japan related to the following: (1) the physiological effects of nature therapy, including those of forests, urban green space, plants, and wooden material and (2) the analyses of individual differences that arise therein. The search was conducted in the PubMed database using various keywords. We applied our inclusion/exclusion criteria and reviewed 52 articles. Scientific data assessing physiological indicators, such as brain activity, autonomic nervous activity, endocrine activity, and immune activity, are accumulating from field and laboratory experiments. We believe that nature therapy will play an increasingly important role in preventive medicine in the future.

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Effects of olfactory stimulation with rose and orange oil on prefrontal cortex activity

Cited by 70 publications

References 22 publications

Comparison of the effects of olfactory stimulation by air-dried and high-temperature-dried wood chips of hinoki cypress (Chamaecyparis obtusa) on prefrontal cortex activity

Comparison of the effects of olfactory stimulation by air-dried and high-temperature-dried wood chips of hinoki cypress (Chamaecyparis obtusa) on prefrontal cortex activity

Physiological effects of touching hinoki cypress (Chamaecyparis obtusa)

Physiological Effects of Nature Therapy: A Review of the Research in Japan

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