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Researchers suggest that integrating nature into urban environments is essential for maintaining emotional wellbeing and brain capital. Credit: Neuroscience News<\/p>\nSummary: Researchers have conducted a comprehensive meta-analysis confirming that exposure to nature\u2014whether real, virtual, or even imagined\u2014significantly reduces negative emotions and boosts brain health. The team reviewed 33 studies involving over 2,100 participants to map the neurophysiological impact of \u201cgreen time.\u201d<\/p>\n
Using tools like EEG and fMRI, the study found that nature exposure creates a more balanced psychological state. As 90% of the U.S. population is expected to live in urban areas by 2050, the researchers argue that \u201cNature Prescriptions\u201d (Nature Rx) should become a cornerstone of urban design and public health to protect our collective \u201cbrain capital.\u201d<\/p>\n
Key Facts<\/p>\n
The \u201cBrain Capital\u201d Concept: Nature exposure is now viewed as a critical determinant of brain health, essential for maintaining the cognitive and emotional resources of a population.Multimodal Benefits: Positive effects were observed across various types of exposure, including outdoor walking, virtual reality (VR) nature environments, and even simply looking at images of the natural world.EEG Insights: Electroencephalogram (EEG) data showed that nature exposure directly correlates with a reduction in negative emotional processing and an increase in positive psychological responses.Urban Priority: With increasing urbanization, the researchers emphasize that environmental factors\u2014not just genetics\u2014play a massive role in shaping mental health risks and resilience.<\/p>\n
Source: University of Houston<\/p>\n
You\u00a0probably heard\u00a0it from your mom a thousand times \u2013 fresh air and sunshine;\u00a0it\u2019s\u00a0the cure for most anything. <\/p>\n
Now scientists at the University of Houston concur, measuring the impact of mother\u2019s advice on mother nature to find that exposure to nature is associated with reductions in negative emotions.\u00a0<\/p>\n
Researchers suggest that integrating nature into urban environments is essential for maintaining emotional wellbeing and brain capital. Credit: Neuroscience News<\/p>\n
Given that\u00a0nearly 90%\u00a0of the U.S. population is projected to\u00a0reside\u00a0in urban areas by 2050, researchers say integrating nature into urban design and public health initiatives is\u00a0an increasingly recognized national public health and economic priority for improving emotional wellbeing.\u00a0\u00a0<\/p>\n
\u201cFindings from this systematic review support the notion that nature exposure is a critical determinant of brain health and therefore brain capital. Thus, promoting and\u00a0maintaining\u00a0healthy environments is critical to promote and grow the world\u2019s brain capital,\u201d said renowned brain scientist Jose Luis Contreras-Vidal,\u00a0Hugh Roy and Lillie Cranz Cullen Distinguished Professor of Electrical and Computer Engineering and director,\u00a0NSF IUCRC BRAIN Center\u00a0(Building Reliable Advances and Innovation in Neurotechnology). He led\u00a0a team of researchers through a systematic review and meta-analysis of the impact of nature on wellness.\u00a0\u00a0<\/p>\n
The team examined the results from 2,101 participants in 33 studies combining neuroimaging and psychological assessments during exposure to real,\u00a0virtual\u00a0or imagined natural environments. EEG was the most widely used neuroimaging modality across the studies reviewed.\u00a0<\/p>\n
\u201cHealthy populations showed a more balanced psychological response, with nature exposure being associated with both increases in positive emotions and reductions in negative emotions,\u201d\u00a0reports\u00a0Contreras-Vidal in the International Journal of Environmental Research and Public Health.<\/p>\n
\u201cGrowing interest in how nature influences the brain has driven research toward understanding its neurophysiological impact. This interest has recognized that genetics alone cannot account for health risk factors and that environmental exposures play a substantial role in shaping brain health.\u201d\u00a0<\/p>\n
The team examined brain studies that included several different tasks:\u00a0<\/p>\n
Imagery:\u00a0The most popular task across studies, images of nature consistently\u00a0demonstrated\u00a0significant effects of nature on well-being. Eight studies reported increases in positive emotions while seven observed decreases in negative emotions.\u00a0\u00a0Virtual Reality: Eight studies implemented VR-based exposure to nature, all of which used EEG as their neuroimaging modality. Six studies reported decreases in negative emotions and five reported increases in positive emotions.\u00a0\u00a0Walking Outdoors:\u00a0Five studies reported an increase in positive emotions and four reported decreases in negative emotions.\u00a0<\/p>\n
While studies employing psychological and neuroimaging can potentially provide a shift in understanding of the neurophysiological impact of nature on brain health and wellness, there is still much to know, and Contreras-Vidal has suggestions.\u00a0<\/p>\n
\u201cEEG studies should expand their scope to incorporate neural metrics like functional connectivity, while prioritizing standardization of real-world multimodal data for study comparisons and effective inclusion of AI,\u201d he said.\u00a0\u00a0<\/p>\n
\u201cUltimately, the goal is to design Nature prescriptions (Nature Rx) to promote brain health and treat mental illnesses across the lifespan,\u201d said Contreras-Vidal.\u00a0<\/p>\n
Based on the findings, the BRAIN Center is working on a study on the neural mechanisms underlying nature\u2019s impact on brain health and wellness in Houston\u2019s Third Ward neighborhood along the green corridor and on the UH campus\u2019 pollinator gardens.\u00a0<\/p>\n
Key Questions Answered:Q: Does looking at a picture of a forest actually help as much as a real walk?<\/p>\n
A: While a real walk is ideal, the study found that even imagery and virtual reality nature experiences significantly decreased negative emotions. Your brain responds to the visual cues of nature even when you can\u2019t get outside.<\/p>\n
Q: What exactly is \u201cBrain Capital\u201d?<\/p>\n
A: It\u2019s a term scientists use to describe the collective brain health and cognitive skills of a community. Protecting it means ensuring people have environments that reduce stress and promote healthy neural function\u2014like parks and green spaces.<\/p>\n
Q: Can VR nature really be used for therapy?<\/p>\n
A: Yes. The meta-analysis showed that VR-based nature exposure consistently improved mood and reduced anxiety. This could be a game-changer for people in high-density cities or those with limited mobility.<\/p>\n
Editorial Notes:This article was edited by a Neuroscience News editor.Journal paper reviewed in full.Additional context added by our staff.About this neurology and aging research news<\/p>\n
Author:\u00a0Laurie Fickman<\/a>
Source:\u00a0University of Houston<\/a>
Contact:\u00a0Laurie Fickman \u2013 University of Houston
Image:\u00a0The image is credited to Neuroscience News<\/p>\n