"The risk for anxiety disorders is 21 percent higher for people from the city, who also have a 39 percent increase for mood disorders," says co-author Jens Pruessner, a researcher at McGill’s Douglas Mental Health University Institute in Montreal. "In addition, the incidence for schizophrenia is almost doubled for individuals who are born and brought up in cities. These values are a cause for concern and determining the biology behind this is the first step to remedy the trend."
Interestingly, it didn’t seem to make much difference whether individuals lived in a concrete jungle or a city with a lot of green space. The implication is that it’s population density, rather than any other factor, which causes the changes in the brain.
I’m very curious what exactly causes this, and what steps might be taken to reduce it.