Final answer:
Myelopathy is the term describing pathologic changes or disease of the spinal cord, which includes conditions like MS and can result in symptoms such as paralysis.
Step-by-step explanation:
The term that describes any pathologic change or disease of the spinal cord is myelopathy. This condition covers various diseases and ailments of the spinal cord, which could result from different causes including infections such as poliomyelitis, which is an inflammatory condition caused by the polio virus affecting the motor neurons. In contrast, myopathy pertains to diseases of the muscle fibers, pyleitis is an inflammation of the renal pelvis, and pyrosis refers to heartburn. Neurological conditions like Multiple Sclerosis (MS) demonstrate how inflammation can damage the myelin sheath of neurons, affecting both the brain and spinal cord, leading to a range of symptoms including physical and cognitive deficits. Diseases such as these can ultimately lead to paralysis or loss of muscle function.