[t97tab]

I posted here a few weeks ago regarding my 13 year old who had suffered a back injury and concurrent concussion.
I wondered if someone might be able to send me in the direction of any medical abstracts that might help me to better understand what is going on with my son. We have had several frustrating sessions with doctors.

I am particularly interested in medical abstracts related to:
1. Late onset of concussion symptoms. (We have been told that if the symptoms do not present within 72 hours, they are not concussion related.)
2. Concussion symptoms that may not be supported by neurological tests.

Thank you so much for any help you can give me.