Minimac,

You said "Hence I believe it is a requirement to have symptoms of PCS before you're at risk of a TBI?" I don't understand what you are trying to say. Did you mean to say "It is a requirement to have symptoms of PCS before you're at risk of a TBI DIAGNOSIS ?"

Please do not get stuck worrying about diagnostic terms. TBI, mTBI, concussions are meaningless for treatment and recovery. It is the symptoms of the injury that matter, regardless of cause. I have had symptoms develop where doctors say I could not have suffered a concussion because the forces were too weak. Yeah right. Tell that to my symptoms, head ache, mental confusion, etc.

My best to you.