The GTP-binding RAS-like 2 gene (DIRAS2), which regulates neurogenesis, as well as protein phosphatase 2, regulatory subunit B, gamma (PPP2R2C) gene located in the 4P16 region, channel-interacting protein 4 (KCNIP4) and SPOCK gene, is also associated with adult ADHD and personality disorders [44, 45, 46, 47]. Here, SPOCK1 is linked to personality disorder.