Signs and symptoms
... Myasthenia gravis can affect any of the muscles that you control voluntarily. It most commonly affects certain muscles, including those of the face, eyes, arms and legs, and those muscles involved in ...

Causes
... When your nervous system functions normally, the chemical acetylcholine transmits nerve impulses to your muscles. At specialized areas of your muscles, called neuromuscular junctions, receptor sites r...

When to seek medical advice
... If you experience muscle weakness or have difficulty controlling the muscles of your eyes, face and mouth, have trouble breathing or experience fluctuating weakness in your arms and legs, see your doc...

Screening and diagnosis
... The key sign that points to the possibility of myasthenia gravis is muscle weakness that improves with rest. Tests to confirm the diagnosis may include: Neurologic examination. This may include testin...