Urban environments, which account for a mere 0.01% of dwelling environments in human history, remain an unfamiliar environment for the human body. The start of the industrial revolution in the UK in the 18th century led to the rapid growth of industrialization and urbanization and significantly changed our living environments. Therefore, the physiological functions of human bodies developed in response to the natural environment. Accumulation of scientific evidence of the physiological relaxation associated with viewing elements of nature would be useful for preventive medicine, specifically nature therapy.įor approximately 6–7 million years, human beings have evolved in the natural environment. Studies that used real nature stimuli reported that visual contact with flowers, green plants, and wooden materials had positive effects on cerebral and autonomic nervous activities compared with the control. The majority of the studies that used display stimuli, such as photos, 3D images, virtual reality, and videos of natural landscapes, confirmed that viewing natural scenery led to more relaxed body responses than viewing the control. Thirty-seven articles presenting evidence of the physiological effects of viewing nature were selected. ![]() The articles were analyzed for their stimulation method, physiological measures applied, groups of participants, and outcomes. In this systematic review, we examined current peer-reviewed articles regarding the physiological effects of visual stimulation from elements or representations of nature in an indoor setting. A variety of physiological indicators adopted for use in indoor experiments have shown the benefits of viewing nature. ![]() ![]() Compared with studies of the other senses, studies investigating the visual effects of nature have been at the forefront of this research field. Contact with nature has been proposed as a solution to achieve physiological relaxation and stress recovery, and a number of scientific verification outcomes have been shown.
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