PVALB and schizophrenia: Parvalbumin interneurons are fast-spiking neurons that are critical to the generation of gamma oscillations, a type of high-frequency neuronal oscillation linked to working memory and other cognitive processes in healthy subjects and patients with schizophrenia (Gonzalez-Burgos et al. 2015; Sohal et al. 2009; Tallon-Baudry et al. 1998; Uhlhaas and Singer 2010).