Summary

multiple_sclerosis is a chronic autoimmune_disease targeting the central_nervous_system. It causes demyelination and injury to the myelin_sheath, slowing nerve conduction. Typical course is relapsing_remitting, with relapses and partial remissions. Common early features include optic_neuritis, sensory changes, motor weakness, and fatigue, often worsened by heat_sensitivity. It is more common in women and young adults. Diagnosis uses clinical history, MRI, and cerebrospinal fluid findings.