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August 1976

Myotonia Congenita With Painful Muscle Contractions

Author Affiliations

From the Department of Neurology, University of Virginia School of Medicine, Charlottesville.

Arch Neurol. 1976;33(8):580-582. doi:10.1001/archneur.1976.00500080058009

• We present a family with dominantly inherited myotonia congenita and painful, electrically silent muscle contractions after exertion. In two family members, painful muscle contractions occurred coincident with hypothyroidism, and improved after thyroid replacement therapy. It is probable that this family represents a disease that is similar to but distinct from the dominant form of myotonia congenita.