Is PTSD a real diagnosis? Can damage to the brain impair moral decision making? Two new studies examining these topics are worth reading.
The first study by researchers at Harvard Medical School titled Is PTSD Caused by Traumatic Sress? suggests that for many folks there is no link between traumatic events and PTSD. The question that naturally flows from this is whether PTSD is being over-diagnosed.
The next study, titled Damage to the Prefrontal Cortex Increases Utilitarian Moral Judgements appears in the journal Nature and examines damage to the ventromedial prefrontal cortex (sorry, no easy link for description) and moral decision making.
Update: Mind Hacks has some good comments on the PTSD study.