Thank you so much for taking the time to reply, Anthony, Nam & veiled.
First and foremost although my wifes problems now are very extreme, her experience at the time of the accident was not in the same league as most of the experiences that i have read about on this site. I can totally understand how these experiences can, will and do have an adverse affect on life.
My wife was at a large public event when she was struck on the back of the head causing her to fall unconcious some 30 minutes after the blow, she was taken to hospital and spent 24 hours in intensive care and 3 further days under observation, upon her release she was diagnosed with post concusion syndrome.
She has had an mri & ct scan which showed no sign of damage(can you really test for ptsd from a scan Anthony)
Two weeks later my wife lost the abillity to speak, it took 3 months to relearn how to speak with lessons from a speach therapist.
My wife is on sleeping pills, antidepressants and beta blockers, I dont think the antidepressants are just for depression, more for the anxiety.

My wifes memory lasts for 4/5 days so she has now lost a complete year, the lack of memory is causing me problems because she forgets she is ill so when somthing triggers her anxiety or she has a nightmare she is very confused as well as being terrified.

If you met my wife in the comfort and secureity of our home, you would only notice mild symptoms, but to see her out and about is very different, she is scared of noise, sudden movement, large vehicles, crowds the list could go on.
My wife finds it very difficult to discuss her nightmares or the flashbacks (is this normal).The flash backs are the worst.
My wife is as bad now as she was many months ago is this normal ?.

Having read the replies I think that maybe my wife has PTSD + something else, I can not believe that my wife could have any symptoms that are worse then others.

thanks
I look forward to hearing from you
steve