This is, I am assuming from the context, not opporating under the assumption PTSD often is rooted in brain damage from exposure to shockwaves.
PTSD doesn't have anything to do with brain damage.
PTSD is a trauma response.
Are you thinking of TBI? TBI is a cumulative impact of small and large head trauma.
Would the treatment be any different? It's my understanding that were have no way of accelerating repair from neurological damage and instead focus on therapies to regain ability.