multiple sclerosis. demyelinating disease. autoimmune disease.

sclerosis multiple myelin neuron demyelinating disease autoimmune vector poster banner card world day neuroprotective damage system nerve nervous axon demyelination cell anatomy health schwann medical science human nerves dendrite medicine diagram ranvier sheath peripheral spinal body care brain cord damaged immune muscle control vision balance healthcare illness disorder neurology receptor growth neuritis ngf protein signal synapse structure loss sclerosis disease