OPN1MW and attention deficit-hyperactivity disorder: We found that cb δ KO females were more hyperactive (Figure 4), reminiscent of stimulant-treated mice (Wiltschko et al., 2020), ASD and ADHD mouse models (Angelakos et al., 2017; Dalla Vecchia et al., 2019; Schmeisser et al., 2012), and chronically stressed animals (Cabib et al., 1988; Füzesi et al., 2016; Strekalova et al., 2005).