Hi I read your post with interest and was sorry to hear about your symptoms!
I was attacked about 6 months ago by someone who hit my front door into my head about 7 times at maximum force, because I had not paid him £5 I owed him and had complained to him about the type of "rap music" he had been listening to.
I told him to stop before I might die and finally he did, and he fled the building. He has reformed since and become a non-violent character, as far as I have heard.
Initially I thought I was OK, and put a towel round my head, and then went into the corrider to clean up all the blood which was absolutely everywhere.
I have not been able to think correctly since, although sometimes I can go several hours where my thinking is completely normal and uninterrupted. I am sure I will get better, but I don't know long this will take.
I now have difficulty holding a normal train of thought inside my head - very stupidly I did not go to doctors so as of today I am unsure whether or not there was brain trauma but judging by the poor quality of my thinking there probably was.
I have heard that there is a combination of chemicals called "Alpha Lipoic Acid" and "Acetyl-L-Carnitine" which when taken together may or definitely assist in growing back brain tissue that has been lost or impacted due to injury.
I am still from time to time thinking very poorly, where a thought will suddenly and upsettingly be diverted into something offensive, however I am overall getting better as I have taken the chemicals I mention above. In my case, I have found that cannabis has been very helpful in keeping myself calm and internally stable, I know that this chemical apparently is not great for everyone though, but for me it is the one that on many occasions has saved my life from a feeling of despair and being one step away from feeling suicidal (in seconds flat). My personality has not changed at all, however my moods have often been very low due to frustrations of "thought crashes" which have upset me. Sometimes my brain has generated "random bursts" of words, but this is now happening less often.
I have been prescribed "psychiatric" drugs, however because I do not have a psychiatric illness, they only act to bring on a worsening of thought problems, I will only feel normal and well if I do not take these, if I do take them this renders me the equivalent of "mentally ill" and I only recover once the chemical/s are out of my bloodstream. A drug called "Olanzapine" was helpful for me, but only when taken as one-off doses very occasionally - when prescribed on a daily dose I understand that many patients have turned obese and have had the quality of their lives taken away.
The chemical 'MDMA' helped me a lot, when I took a small amount of it with water. I felt instantly happier again. The chemical 'Procyclidine' has been helpful too to me, by improving my mood.
These are my experiences, my main advice is to research the Alpha Lipoic Acid and Acetyl-L-Carnitine chemicals, because these have definitely been helpful in my case to improve things for me.
As I have still had thought processing problems, I am going to request a brain scan from my Doctors tommorow - which I should have done straight away after the attack. The attack impacted me on the forehead, on another occasion an attic door slammed into the back of my head with full force too.
I hope this information may be helpful and hope you have got better yourself since 2008. The best things for me were the Alpha Lipoic Acid and Acetyl-L-Carnitine, the 'MDMA', and the cannabis. Good luck mate!