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Myasthenia gravis is an autoimmune disease that causes muscular weakness and fatigue, which is exacerbated by activity and improved with rest. Under normal circumstances antibodies are produced by the immune system largely to fight off infection. Myasthenia gravis causes the immune system to produce antibodies that target healthy cells, commonly affecting the cellular receptor in muscle cells for the neurotransmitter acetylcholine, which stimulates muscular contractions (Hoch 2001). The disease is characterized by fluctuating periods of muscular weakness, with easy fatigability representing a classic hallmark of the disease. Drooping eyelids, blurred vision, and difficulty chewing and swallowing are common symptoms.