Hi whatsnew2day,
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Does anyone have information on the biological reasons behind PTSD? I have read that chronic cortisol messes up the serotonin regulation, which interferes with the HPa axis in the brain.
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PTSD is the result of trauma (war, abuse, life threatening events, ect).
PTSD can cause changes to the brain, processing, flight/fight/freeze response, thoughts and feelings.
http://psychcentral.com/lib/2006/what-causes-ptsd/