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How does primary-progressive multiple sclerosis affect the body?

Primary-progressive multiple sclerosis (PPMS) affects your body similarly to other forms of multiple sclerosis (MS). It is a disease that alters the functioning of your nervous system by damaging the protective layer that surrounds your body's nerves, called the myelin sheath. After the myelin sheath is damaged, it's harder for the nerves to transmit signals throughout your body. That's why there is such a wide range of symptoms associated with MS. MS also causes lesions in your brain and spinal cord, and people with PPMS tend to have more lesions in their spinal cord than their brain.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.