Myasthenia gravis - Symptom
Neuromusclar disorder - myasthenia gravis
Myasthenia gravis causes weakness of the voluntary (skeletal) muscles. Voluntary muscles are those that are under your control. In other words, you think about moving your arm, and it moves. The muscle weakness of myasthenia gravis worsens with activity and improves with rest.
The muscle weakness can lead to a variety of symptoms, including:
Signs and tests:
The health care provider performs a physical exam, including a detailed nervous system (neurological) examination. This may show:
- Muscle weakness - eye muscles are usually affected first
- Reflexes and feeling (sensation) are normal.
Tests that may be done may include:
- Reviewed last on: 6/18/2011
- Kevin Sheth, MD, Department of Neurology, University of Maryland School of Medicine, Baltimore, MD. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
Benatar M, Kaminski HJ. Evidence report: the medical treatment of ocular myasthenia (an evidence-based review): report of the Quality Standards Subcommittee of the American Academy of Neurology. Neurology. 2007;68(24):2144-9.
Vincent A, Newsom-Davis J. Disorders of neuromuscular transmission. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier. 2007: chap 448.
Zinman L, Ng E, Bril V. IV immunoglobulin in patients with myasthenia gravis: a randomized controlled trial. Neurology. 2007;68(11):837-41.
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