"Chiropractor always says the spine is twisted until the doc adjusts it."
Typical comment from a chiropractor, and it sure keeps you coming back and paying more and more bills, but no cure for the problem.
Your brother needs to see a spine specialist ASAP. Either an orthopedic surgeon that specializes in spines or a neurosurgeon that specializes in spines only.
He needs a full evaluation from a spinal specialist, an MRI and then a diagnosis can be made and a treatment plan to help ease your brother's pain.
In the mean time, stay away from the chiropractor.
Good luck
Fran