Myelitis involves the infection or the inflammation of the
white matter or
gray matter of the
spinal cord which is a part of central nervous system that acts as a bridge between the brain and the rest of the body. During an inflammatory response in the spinal cord, the
myelin and
axon may be damaged causing symptoms such as paralysis and sensory loss. Myelitis is classified to several categories depending on the area or the cause of the lesion; however, people often refer to any inflammatory attack on the spinal cord as transverse myelitis.