However, FXS is associated with hyperactivity, impaired social interaction, and the development of repetitive, or stereotyped behaviors, all of which are influenced by striatal activity, suggesting that FMRP may regulate synaptic function in this region, as well (Langen et al., 2011; Bagni et al., 2012; Báez-Mendoza and Schultz, 2013; Yael et al., 2019). This evidence concerns the gene FMR1 and fragile X syndrome.