Meditation helps maintain a better quality of life with every day wear & tear ie : stress.  No surprise that the same is true with the extremes of PTSD.

WAR VETERANS HAIL MEDITATION AS BENEFICIAL, COST-EFFECTIVE POST TRAUMATIC STRESS DISORDER TREATMENT

http://au.news.yahoo.com/latest/a/-/latest/18011236/war-veterans-hail-meditation-as-beneficial-cost-effective-post-traumatic-stress-disorder-treatment/