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Extract”Research from the University of California, Berkeley, reveals an upside to experiencing moderate levels of stress. But it also reinforces how important it is to keep stress under control. The study, led by post-doctoral fellow Elizabeth Kirby, found that the onset of stress entices the brain into growing new cells responsible for improved memory. However, this effect is only seen when stress is intermittent. As soon as the stress continues beyond a few moments into a prolonged state, it suppresses the brain’s ability to develop new cells.
“I think intermittent stressful events are probably what keeps the brain more alert, and you perform better when you are alert,” Kirby says. For animals, intermittent stress is the bulk of what they experience, in the form of physical threats in their immediate environment. Long ago, this was also the case for humans. As the human brain evolved and increased in complexity, we’ve developed the ability to worry and perseverate on events, which creates frequent experiences of prolonged stress.”