Thank you for the tips Mark. You're right, I didn't mean actual "shock" but just rather confusion and in an altered state of mind(1st survival mode and then confusion.) I had no alcohol in my system. I was reading about post traumatic stress disorder and the author Stephen Joseph said, "During trauma, however, the activity fot he hippocampus is supressed. Many scientists believe that this outcome is related to exxcessive stress, which kills neurons in the hippocampal pathway. It's as if a fuse has blown in the brain, shutting down the usual transfer of information...It usually takes around a month for the brain to repair the "blown fuse."

I no longer experience symptoms associated with PTSD but I'm wondering if that's contributing to my delayed recovery. I was taking pain relievers for another injury the 1st month after my accident so I'm thinking that masked a lot of my symptoms. I will watch that series on you tube. Thanks.