SCN9A and epilepsy: As basic epilepsy research and genetic screening techniques have improved more than 400 genetic mutations associated with epilepsy have been identified, including SCN1A, SCN2A, SCN3A, SCN8A, SCN9A, SCN1B, KCNQ2, KCNQ3, KCTD7, CACNA1H, CLCN2, GABRA1, GABRB3, GABRG2, SLC2A1, CDKL5, ARX, CHD2, STXBP1, and PNPO [25,26,27].