PVALB and schizophrenia: Using an unbiased stereological method, we observed a decrease in the number of parvalbumin positive interneurons in the vSub and ventral DG of the hippocampus of rats with the MAM developmental disruption model of schizophrenia, consistent with previous findings (Penschuck et al., 2006; Lodge et al., 2009; Chen et al., 2014; Gill and Grace, 2014).