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Study: Living In A City Might Make You Crazy
Ever wondered why those apple-cheeked Himalayan villagers look so untroubled, even as most of your friends and family make weekly visits to the therapist? You might finally have your answer -- and it really shouldn't come as much of a surprise.
According to a study reported in the science journal Nature, city-dwellers are more prone1 to mental disorders3 than those living in villages and smaller towns.
Psychiatrist4 Andreas Meyer-Lindenberg and collaborators at the Central Institute of Mental Health and the University of Heidelberg Medical Faculty5 in Mannheim, Germany recruited 32 volunteers from cities, towns and villages and asked them to work on difficult arithmetic problems while monitoring brain activity. Meyer-Lindenberg found that that volunteers who currently lived in a city exhibited greater activity in the amygdala -- the brain part that is overactive in persons with social anxiety disorder2. He also found that those raised in a city showed more activity in the perigenual anterior6 cingulate cortex (pACC), a region that has been implicated7 in some studies on schizophrenia.
The results of the initial study encouraged Meyer-Lindenberg to conduct a further study, this time with visual cues of scientists frowning at those working on the problems. Again they found a greater stress response in those volunteers who lived in the city. According to Nature, even the most powerful gene8 linked to schizophrenia only conveys a 20 percent increased risk. But the disease is twice as common in those who are city-born and raised as in those from the countryside, and the bigger the city, the higher the risk.
However, the small sample size means that the results so far are not conclusive9.
The team now plans to conduct similar studies on the general population and on immigrants to map the connection between social isolation10 and mental illness.
While epidemiologists have long sought out -- and proven -- the link between the mental illness and the attendant stresses of city life, neuroscientists have thus far stayed away from such studies. This is perhaps the first study of its kind by a psychiatrist.
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1 prone | |
adj.(to)易于…的,很可能…的;俯卧的 | |
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2 disorder | |
n.紊乱,混乱;骚动,骚乱;疾病,失调 | |
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3 disorders | |
n.混乱( disorder的名词复数 );凌乱;骚乱;(身心、机能)失调 | |
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4 psychiatrist | |
n.精神病专家;精神病医师 | |
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5 faculty | |
n.才能;学院,系;(学院或系的)全体教学人员 | |
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6 anterior | |
adj.较早的;在前的 | |
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7 implicated | |
adj.密切关联的;牵涉其中的 | |
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8 gene | |
n.遗传因子,基因 | |
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9 conclusive | |
adj.最后的,结论的;确凿的,消除怀疑的 | |
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10 isolation | |
n.隔离,孤立,分解,分离 | |
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