Respuesta :

This disease involve the deterioration of the Myelin sheath.
Multiple sclerosis is a long-lasting disease that can affect the brain, spinal cord and the optic nerves in the eyes. It occurs when the immune system attacks a fatty material around the axon of the neuron or the nerve fibers called the Myelin sheath. The myelin sheath is essential for proper functioning of the nervous system. 
mylin sheath is your answer