So sorry to hear about your daughter. What a horrible thing for a young person to have to endure. I've had the exact same experience with an MRI. It was about three months after my injury, and I was just starting to feel a bit better. I felt an immediate return to cognitive symptoms (disjointed, incomplete, and repetitive thoughts) right after a sequence that involved rapid vibrations of the table (and thus my head). A couple of days later, I had horrible vertigo and I'm continuing to have mild balance issues (vertigo, dizziness and balance were never symptoms of my original injury).

I'm now approaching 6 months post injury and am still having significant cognitive issues. Although there is no way to know for sure, I believe those horrible MRI vibrations have significantly interfered with my recovery. I think anyone getting an MRI for a concussion, should press the "distress button" as soon as they feel their head vibrate. Out of about 8 or 9 sequences in my MRI, only one involved vibrations.

I hope that your daughter recovers soon and that she enjoys a full healthy life ahead of her.