'It can be a blow to the head, or the resulting brain injury that produces brief unconsciousness'
a concussion
THE BRAIN: It can be a blow to the head, or the resulting brain injury that produces brief unconsciousness
It can be a blow to the head, or the resulting brain injury that produces brief unconsciousness
It can be a blow to the head, or the resulting brain injury that produces brief unconsciousness
THE BRAIN
a concussion
THE BRAIN