Extavia

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<H1>Extavia </H1><P>Extavia,Multiple sclerosis, or MS, is a disease of the central nervous system. Your central nervous system includes your brain and spinal cord, which contain special kinds of cells called neurons designed to send signals throughout your body. These signals pass through nerve fibres called axons, which are protected by an insulating sheath composed of myelin. These signals are responsible for many functions, including balance, physical coordination, eyesight, and memory.</P>