GRIA2 and infection: Quantification of the effect of RCASBP(B)-RFP-GluA2 siRNA infection on the maturation of network activity in E11 spinal cords indicates that downregulation of GluA2 expression and the appearance of Ca2+ permeable AMPA receptors did not disrupt the episode duration (Fig. 7D) or inter-episode interval (Fig. 7E) when compared with the pattern of activity generated in non-infected or RCASBP(B)-scrambled siRNA-infected embryos.