Hi there, I just wanted to let you know about something that has been a major game changer for me. Your son sounds like he has the same residual problems that I have had for the past two years after slipping on ice and hitting my head. I have been suffering for two years and have been researching day and night to find a cure for my condition. Doctor's couldn't help me.. just gave me anti depressants and more pain killers.... but a piece of my personality was still missing. I recently found a specialist who adjusted my Atlas vertebrae. It's a very specific adjustment that regular chiropractors don't do. It's the vertebrae at the very top of your spine. It is only about 1.5 oz and supports your brain and skull. I had an mri which regular docs said was fine but when the specialist looked at it she realized that that vertebrae was off to one side which meant that my cerebellum (rear brain section) was falling below my skull and being pulled into my spinal cavity. After the adjustment I have no stabbing brain pain, my balance is better, I don't stutter, and my memory seems to have improved....along with several other symptoms. The doctor that I see is in Vancouver BC. Her name is Dr. Sabrina Chen-see. You can look her up on the net and see what I'm talking about. I hope this helps your son. Hugs