As we progress through life we inevitably find ourselves becoming increasingly forgetful. It is not as if bouts of forgetfulness never occurred when we were younger. It’s just that it begins to happen more and more frequently – to the point where it becomes much more noticeable; even troublesome . From our mid-twenties onwards we lose more neurons (brain wires) and synapses (connections between the brain wires) than we build. The long term end point of this perfectly natural, gradual process of brain aging is dementia. By which I mean if we all lived to the impossibly grand old age of 200, every single one of us would have developed dementia of one description or another along the way. In reality very few of us will even make it to the grand old age of 100, let alone 200. Of those that do, not everyone will have become plunged into the amnesic fog of dementia. So what is the difference between individuals that do and don’t develop dementia well into their senior years? Is it blind luck? Or is there something we can do to lengthen our dementia-free status?
Spending time in green spaces reduces blood pressure, increases self-reported happiness ratings and even boosts self-confidence. And this is not just because being in clean and tidy natural environments encourages people to take exercise. Neither, it seems, do you have to actually be physically outdoors in these spaces to benefit from these life-enriching effects. Merely having a view over a natural green space is sufficient to influence the rate of healing and the perception of pain. In a famous Science study published in 1984 by Roger S. Ulrich, patients whose recovery room had either a view of a small copse of trees or a brown brick wall were compared, retrospectively, in terms of duration of their stay in hospital and strength of analgesia required to deal with the pain induced by gall bladder surgery performed in the same Pennsylvanian hospital. They found that on average those with the view of a green space spent on average one less day in hospital and required much fewer moderate or strong doses of pain killers compared to those with a view of the brick wall.
Numerous studies have been conducted since to try to establish what aspects of the natural environment have the strongest benefits to our wellbeing. Virgnia I Lohr, of Washington State University, describes studies suggesting that bright green colours synonymous with luscious vegetation make us feel happier than light greens and yellows that could indicate plant nutrient deficiencies. Furthermore not only does mood improve when we look at trees but we even have a preference for trees with spreading canopies over short and stubby bush like trees typically found in arid areas and tall / narrow trees typically found in areas of very high rainfall. The explanation Lohr offers for these preferences for bright greens and trees with spreading canopies is that such visual stimuli are indicative of conditions suitable for the proliferation of human life. In other words an innate appreciation of such visual characteristics conferred a survival advantage to early humans as they would have been attracted to environments with flourishing plantlife and thus food sources, whilst others would have perished in environments that were either too dry or to wet.
So whether you are recovering from illness, or merely wish to boost your mood, get outside and take a stroll in the countryside, in your local park or common. If that’s not possible for one reason or another go take a few moments to sit somewhere with a view of some greenery. As I type I happen to be whizzing through the Northumbrian countryside on a train (that’s in the North-East of England for those who live further afield) meditating upon how beautiful it is. Enjoy!
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