In parvalbumin-positive (PV) interneurons, ErbB4 is involved in the etiology of schizophrenia and epilepsy (Chen et al., 2010; Del Pino et al., 2013; Fisahn et al., 2009; Kx et al., 2012; Tan et al., 2011). Here, ERBB4 is linked to schizophrenia.