It is not nerves that get inflamed although they can. It is the soft joint tissue around the traumatized joint. The inflamed joint tissue acts like a blood pressure cuff and squeezes the blood vessels.

I was meaning Chronic sleep problems. Lack of quality sleep, sleep apnea, and such limit the brains ability to detoxify and properly oxygenate.

Diffuse axonal injuries are to the axons between neurons and dendrites. The injury can be diffuse (throughout) the brain. The injury is believed to be to the myelin sheath that insulates the axons.

B-12, folic acid and other supplements can provide the best environment for the myelin sheath to heal.

When nerves in the neck get inflamed, they can cause muscle spasms that can also reduce blood flow.