<p>Neuromuscular disorders affect your neuromuscular system. They can cause problems with:</p><ul> <li>The nerves that control your muscles</li> <li>Your muscles</li> <li>Communication between your nerves and muscles</li> </ul> <p>These disorders can cause your muscles to become weak and waste away. You may also have symptoms such as spasms, twitching, and pain.</p> <p>Examples of neuromuscular disorders include:</p><ul> <li><a href="https://medlineplus.gov/amyotrophiclateralsclerosis.html">Amyotrophic lateral sclerosis</a></li> <li><a href="https://medlineplus.gov/musculardystrophy.html">Muscular dystrophy</a> </li><li><a href="https://medlineplus.gov/myastheniagravis.html">Myasthenia gravis</a></li> <li><a href="https://medlineplus.gov/spinalmuscularatrophy.html">Spinal muscular atrophy</a></li> </ul> <p>There can be different causes for these diseases. Many of them are genetic.This means they are inherited (run in families) or are caused by a new mutation in your genes. Some neuromuscular disorders are <a href="https://medlineplus.gov/autoimmunediseases.html">autoimmune diseases</a>. Sometimes the cause is unknown.</p> <p>Many neuromuscular diseases have no cure. But treatments may improve symptoms, increase mobility, and lengthen life.</p>