| Louise suffers from osteoporosis and myasthenia, a muscle weakness which means she needs to sleep for about four hours after every riding lesson. |
| The drug was first approved by the FDA as a treatment for myasthenia gravis, a chronic neuromuscular disease. |
| Electromyography is indicated in patients with motor unit disorders, such as polymyositis, myasthenia gravis or amyotrophic lateral sclerosis. |
| It has been useful in treating autoimmune diseases such as myasthenia gravis. |
| Unlike myasthenia, however, it is associated with improved strength with repeated muscle activity. |
| For example, neurophysiologists can define and measure muscular fatigue precisely in such conditions as myasthenia gravis. |
