Myasthenia gravis is considered to be an autoimmune disorder.
In an autoimmune disease, some of the body's antibodies mistake a part of your own body as foreign, resulting in its destruction. In the case of myasthenia gravis, antibodies block, attack or destroy the acetylcholine receptors needed for muscle contraction.
Besides, researchers believe that the thymus gland, a part of your immune system situated in the upper chest beneath your breastbone, may trigger or maintain the production of the antibodies that block acetylcholine.
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