Myasthenia Gravis (MG) is a chronic neuromuscular disorder which means "grave muscle weakness." The disorder is characterized by abnormal weakness of the voluntary muscles (those controlled by will), such as chewing, swallowing, smiling, drooping eyelids, double vision, weakness in the arms and legs and in some cases difficulty breathing. Weakness increases with repeated activity and decreases with periods of rest. It can affect persons of any age or race including newborns. However, the disorder is more prevalent in young adult females and older males. There are several medications and treatments to control symptoms and which requires ongoing physician care. At this time there is no known cause or cure for myasthenia gravis, but the MG Association of Western Pennsylvania is always here to advocate, inform, and help those affected by this disorder. For more detailed information, make a selection from the tab to the left.