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myasthenia gravis myasthenia gravÂ·is (grÄv'Ä­s) n. A disease characterized by progressive fatigue and generalized weakness of the skeletal muscles, especially those of the face, neck, arms, and legs, caused by impaired transmission of nerve impulses following an autoimmune attack on acetylcholine receptors. Also called Goldflam disease.
Myasthenia gravis is a neurological condition characterized by weakness of the skeletal muscles.In myasthenia gravis, only the muscles used for movement (not involuntary muscles such as the heart) are affected.yasthenia gravis is a neurological condition characterized by weakness of the skeletal muscles.