Myotonia congenita
Alternate Names : Thomsen's disease, Becker's disease
Definition
Myotonia congenita is an inherited condition that affects muscle relaxation. It is congenital, meaning that it is present from birth.
Overview, Causes, & Risk Factors
Myotonia congenita is caused by a change (mutation) to a gene. It is passed down from either one or both parents to the children (inherited). Myotonia congenita is believed to be caused by a problem in the part of the muscle cells that are needed for muscles to relax. Abnormal repeated electrical discharges occur in the muscles, causing a stiffness called myotonia.
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