Anything that walks across a boundary shared by two locations. For instance, if something walks into A from B, it is walking out of B and walking into A; therefore, it is walking in but walking out.
It really depends on many factors that only a doctor can diagnose. The "Related Link" below describes how dynamic splints have helped arthritis patients. A Certificate of Medical Necessity (similar...
Because the nerves that control the bladder and bowels are located in the lower spine, therefore any damage of the spine from the waist down can cause lack of bladder and bowel control.