SCN1B and Dravet syndrome: To test whether a similar delay in maturation of neuronal GABAergic signaling occurs in a different model of DS, Scn1a+/− mice on the (C57BL/6J × 129S6/SvEvTac)F1 strain29, we examined EGABA in P13-21 Scn1a WT and +/− cortical and hippocampal pyramidal neurons (Fig. 7, panels A and B) using the same procedures as for Scn1b neurons in Fig. 4.