Evidence map›Paper›PMID 34065588›Full record

Trial reportInternational journal of environmental research and public health2021

The Mood-Improving Effect of Viewing Images of Nature and Its Neural Substrate.

Rikuto Yamashita, Chong Chen, Toshio Matsubara, Kosuke Hagiwara, Masato Inamura, Kohei Aga, Masako Hirotsu, Tomoe Seki, Akiyo Takao, Erika Nakagawa and 6 more

Abstract readRandomized Controlled Trial
In one paragraph

Trial report in International journal of environmental research and public health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 3 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Trial
  5. Trial
  6. Trial
  7. Article
  8. Article
  9. Article
  10. Article
  11. Relationship Between Darkness and Healing of Night Sky in Planetarium.International journal of environmental research and public health · 2025
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Editorial: New insights into stress coping and resilience.Frontiers in behavioral neuroscience · 2023
    Article
  18. Contribution of Home Gardens to Sustainable Development: Perspectives from A Supported Opinion Essay.International journal of environmental research and public health · 2022
    Article
  19. Impact of Education for Sustainable Development on Cognition, Emotion, and Behavior in Protected Areas.International journal of environmental research and public health · 2022
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

16 authors.

Rikuto YamashitaDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.
Chong ChenDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.ORCID 0000-0002-3189-7397
Toshio MatsubaraDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.
Kosuke HagiwaraDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.
Masato InamuraDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.
Kohei AgaDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.
Masako HirotsuDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.
Tomoe SekiDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.
Akiyo TakaoDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.
Erika NakagawaDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.
Ayumi KobayashiDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.
Yuko FujiiDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.
Keiko HirataDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.
Harumi IkeiCenter for Environment, Health and Field Sciences, Chiba University, Chiba 277-0882, Japan.ORCID 0000-0001-5126-9198
Yoshifumi MiyazakiCenter for Environment, Health and Field Sciences, Chiba University, Chiba 277-0882, Japan.ORCID 0000-0002-3170-6810
Shin NakagawaDivision of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

It has been recently suggested that contact with nature improves mood via reducing the activity of the prefrontal cortex. However, the specific regions within the prefrontal cortex that underlie this effect remain unclear. In this study, we aimed to identify the specific regions involved in the mood-improving effect of viewing images of nature using a 52-channel functional near-infrared spectroscopy (fNIRS). Specifically, we focused on the orbitofrontal cortex (OFC) and dorsolateral prefrontal cortex (dlPFC), two regions associated with affective processing and control. In a randomized controlled crossover experiment, we assigned thirty young adults to view images of nature and built environments for three minutes each in a counterbalanced order. During image viewing, participants wore a fNIRS probe cap and had their oxyhemoglobin (oxy-Hb) measured. Immediately following each image viewing, participants indicated their mood in terms of comfortableness, relaxation, and vigor. Results showed that viewing images of nature significantly increased comfortableness and relaxation but not vigor compared to viewing images of built environments, with a large effect size. Meanwhile, the concentration of oxy-Hb in only the right OFC and none of the other regions significantly decreased while viewing the images of nature compared to built environments, with a medium effect size. We speculate that viewing images of nature improves mood by reducing the activity of or calming the OFC. Since the OFC is hyperactive in patients with depression and anxiety at rest, contact with nature might have therapeutic effects for them.

Indexed as

AffectOxyhemoglobinsPrefrontal CortexRelaxationHumansSpectroscopy, Near-InfraredYoung AdultOxyhemoglobinsaffectgreen plantsnatural environmentnear-infrared spectroscopyorbitofrontal cortexrelaxation

Identifiers

PMID34065588
PMCPMC8161053

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.