With few exceptions, the spinal nerves have ample room in the intervertebral foramina formed by normal vertebrae. Outside the existence of vertebral pathology, with the possible exception of the 5th lumbar intervertebral foramen which, as we noted earlier, fits snugly around its nerve trunk, compression of a spinal nerve does not occur easily. Many people go through life without experiencing the severe pain of a thoroughly compressed or irritated nerve trunk. Slight irritation or compression of a spinal nerve will, however, result in neurological and painful symptoms being referred over the course of the nerve into such structures as the arms, legs, and trunk, but this does not necessarily result in a disturbance of the internal organs. The blood is subject to a variety of diseases but receives no nerves, not even in the bones where most of the blood cells are formed.
Malaria is a protozoan blood disease transmitted to man by mosquitoes.
The organisms can be seen in the red blood cells which circulate throughout the body. Pernicious anemia poses the same problem. . . . Nerve fibers have specific functions and those functions are lost with continued pressure on the nerve. The area of skin deprived of its nerves does not show increased susceptibility to cancer. There are no nerve fibers for kidney disease, tuberculosis or diphtheria.