Your brain has nerves and those nerves run throughout your system so in that case your central nervous system control everything. It is like a director it tells your heart to pump blood it signals everything it even control your homeostasis and reflex.
Im just some random dude so i think its maybe assisting them
1 physical
2 mental
without mental/emotional health everything else will be out of balance.
The answer is Yes. All trauma patients are assumed to have a Cervical spine (C-Spine) injury until proven otherwise