As in the present case, pregnancy appears to worsen the myotonia in some women, indicating that there is a hormonal influence on the condition. In cases of recessive MC, grip myotonia, percussion ...

On examination, she had bilateral Chvostek signs, positive tongue and thenar percussion myotonia, orbicularis oculi and grip-contraction myotonia and a pronounced lid lag. Case 4. M.M. (family ...