Old memory traces in brain may trigger chronic pain

Why do so many people continue to suffer from life-altering, chronic pain long after their injuries have actually healed?

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<p><a href="http://www.physorg.com/news100185500.html">Old memory traces in brain may trigger chronic pain</a></p> <p>Why do so many people continue to suffer from life-altering, chronic pain long after their injuries have actually healed?</p>