In addition to being implicated in OCD, the IFG is also thought to be involved in TS, with studies reporting significant IFG activity at tic onset (Bohlhalter, 2006; Stern et al., 2000), and during tic (Tinaz et al., 2014) and blink suppression (Mazzone et al., 2010), with activity correlating with tic severity and suppression ability. This evidence concerns the gene IFNG and Timothy syndrome.