[npteljes]

Not detachment from pain, you misunderstand. You will feel all the pain just the same. It's just that pain won't imply the same amount of suffering, as you experienced before. In this context, pain is what you feel, suffering is what you make of it.

What you are reminded of, regarding ptsd and detachment, is called dissociation (in psychology). It's an unhealthy, but working, coping mechanism for something that a mind decides it cannot face. A major difference with the detachment I'm trying to explain is that the Buddhist / stoic practice is conscious, but dissociation is unconscious.