FOXG1 and microcephaly: In this regard, it is notable that hippocampal structural anomaly, particularly with hypogenesis of the hippocampal dentate gyrus was reported for Foxg1 mutant mice along with corpus callosum agenesis and microcephaly (Shen et al., 2006; Tian et al., 2012; Cargnin et al., 2018).