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New research examines how stress knots brain

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Stress can damage the brain. The hormones it releases can change the way nerves fire, and send circuits into a dangerous feedback loop, leaving us vulnerable to anxiety, depression and post-traumatic stress disorder.

But how stress accomplishes its sinister work on a cellular level has remained mysterious.

Neuroscientists at a University of California at Berkeley lab have uncovered evidence that a well-known stress hormone trips a switch in stem cells in the brain, causing them to produce a white matter…

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