MS isn't really a neurological disorder it is a circulation problem , the arteries in the neck do not pump enough blood to the brain
Actually it has nothing to do with circulation. Multiple sclerosis is an autoimmune condition leading to demyelination of the nerves. The triger is viral, but there is also adrenal dysfunction involved leading to an over production of low affinity (nonspecific) antibodies that mistake the myelin for an antigen. The brain is not the only area affected by MS. Lesions also develop on the spinal cord.