The human KCNQ2 gene is susceptible to a variety of mutations, many of which give rise to a form of infantile epilepsy (benign familial neonatal seizures, BFNS), and sometimes to forms of peripheral nerve hyperexcitability such as myokymia [1]–[4]. The gene discussed is KCNQ2; the disease is Benign familial neonatal seizures.