Scientists have begun to examine how the city affects the brain, and the results are chastening. Just being in an urban environment, they have found, impairs our basic mental processes. After spending a few minutes on a crowded city street, the brain is less able to hold things in memory, and suffers from reduced self-control. While it's long been recognized that city life is exhausting -- that's why Picasso left Paris -- this new research suggests that cities actually dull our thinking, sometimes dramatically so.
"The mind is a limited machine,"says Marc Berman, a psychologist at the University of Michigan and lead author of a new study that measured the cognitive deficits caused by a short urban walk. "And we're beginning to understand the different ways that a city can exceed those limitations."
One of the main forces at work is a stark lack of nature, which is surprisingly beneficial for the brain. Studies have demonstrated, for instance, that hospital patients recover more quickly when they can see trees from their windows, and that women living in public housing are better able to focus when their apartment overlooks a grassy courtyard. Even these fleeting glimpses of nature improve brain performance, it seems, because they provide a mental break from the urban roil.
Boston.com |
How the City Hurts Your Brain (And What You Can Do About It)
On December 2nd, 2009 we will begin slicing the brain of the amnesic patient H.M. into giant histological sections. The brain specimen is going to be frozen and sectioned whole during one continuous session that we expect will last approximately 30 hours.
Scientists have begun to examine how the city affects the brain, and the results are chastening. Just being in an urban environment, they have found, impairs our basic mental processes. After spending a few minutes on a crowded city street, the brain is less able to hold things in memory, and suffers from reduced self-control. While it's long been recognized that city life is exhausting -- that's why Picasso left Paris -- this new research suggests that cities actually dull our thinking, sometimes dramatically so.
Why don't things make us happy? The answer, I think, has to do with a fundamental feature of neurons: habituation. When sensory cells are exposed to the same stimulus over and over again, they quickly get bored and stop firing. (That, for instance, is why you don't feel your underwear.) This makes sense: the brain is an efficient organ, most interested in the novel and new. If we paid attention to everything, we'd quickly be overwhelmed by the intensity of reality. Unfortunately, the same logic applies to material objects. When you buy a shiny new Rolex watch, that watch might make you happy for a few days, or maybe even a week. Before long, however, that expensive piece of jewelery becomes just another shiny metal object - your pleasure neurons have habituated to the luxury good. (Of course, your Rolex can become a problem for everybody else, since it raises the material expectations of all those poor souls wearing less expensive watches. These people now feel inferior, since their Timex has been devalued by the costlier item. [Such luxury items are known as "positional goods," since part of their appeal is that they signal your social position.] Multiply this same psychological phenomenon across a full range of consumer products - from clothes to cars, stereos to shoes - and you can begin to see the "hedonic treadmill" that afflicts people in developed countries. Not only do their brain cells automatically adapt to their state of wealth, but those same neurons are constantly being bombarded with a new set of expensive expectations. Of course, not everybody can afford a Rolex or a Lexus, which means that we are constantly being disappointed.)
