Medical Dictionary: Myotonia Congenita

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Myotonia Congenita: Another name for Myotonic Dystrophy.
Myotonia Congenita (condition): Muscle disorder with abnormally slow relaxation of the muscles.

Myotonia Congenita: Myotonia congenita is a genetic, neuromuscular disorder characterized by the slow relaxation of the muscles. Symptoms may include muscle stiffness and hypertrophy (enlargement). The disorder is caused by a genetic mutation involving the chloride channel of the muscles. The muscle stiffness, which particularly occurs in the leg muscles, may be enhanced by cold and inactivity, and is often relieved by exercise. 1

More information on medical condition: Myotonic Dystrophy:

1. excerpt from NINDS Myotonia Congenita Information Page: NINDS

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