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When Does Myotonia Occur?

Sarah Jenkins • • 6 min read
When Does Myotonia Occur?

Affected individuals typically have normal muscle strength or only minimal muscle weakness. In individuals with Becker type myotonia congenita

myotonia congenita
Myotonia congenita is a congenital neuromuscular channelopathy that affects skeletal muscles (muscles used for movement). It is a genetic disorder. The hallmark of the disease is the failure of initiated contraction to terminate, often referred to as delayed relaxation of the muscles (myotonia) and rigidity.
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, symptoms tend to become apparent between the ages of four to 12 years. However, in some rare cases, onset may occur as late as approximately 18 years of age.

What causes myotonia?

Myotonia is caused by an abnormality in the muscle membrane, and is often associated with inherited neurological disorders.

Are you born with myotonia?

Babies with congenital DM1 often are born with clubfeet, a curvature of the feet and lower legs. The problem may be due to abnormal muscle development in the lower legs and feet during fetal life. Infants with DM1 do not have myotonia at first but develop it later in life.

Sarah Jenkins
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Sarah Jenkins

Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.