Which statement best describes MS in relation to neuron death?

• A. MS is primarily a disorder of neuron death
• B. MS is primarily a demyelinating disorder, not a disorder of neuron death.
• C. MS is identical to other demyelinating disorders
• D. MS is not a demyelinating disease

Answer: (B)

Multiple sclerosis centers on loss of the myelin sheath around CNS axons due to an autoimmune attack on oligodendrocytes. Demyelination slows or blocks nerve conduction, producing the hallmark symptoms, because the myelin sheath normally speeds up and protects impulse transmission. Neurons themselves aren’t primarily dying at the outset; the disease’s defining problem is the destruction of myelin. Over time, chronic demyelination can lead to axonal damage and neurodegeneration, but that neuronal loss tends to be a downstream consequence rather than the initiating process. So describing MS as a demyelinating disorder rather than a primary neuron-death disorder best captures its core pathology.