According to the Doc all brain injury was from me accident. The helmet kept my head from being smashed open because it hit the granite curb. As it was my brain received enough bruising in the front lobe that I had to see a speech therapist for a little while while in rehab to help get over the little slurring of words I had and just to cope with the head injury. I now have no problem speaking just a little problem with short term memory but I have leaned to adapt with day planners and a reminder calender on my computer at work. All in all I consider my self very lucky. All I can say is you adapt and over come when something like this happens to you. Thank God for the helmet. Thats one of the reasons I will not ride with anyone that will not wear a helmet.