a1 Behavioural Genetics Group, Department of Psychological Medicine, School of Medicine and School of Psychology, University of Cardiff, Cardiff CF14 4XN, United Kingdom. email@example.com http://www.cardiff.ac.uk/medic/contactsandpeople/d/davies-william-dr-overview_new.html firstname.lastname@example.org http://www.cardiff.ac.uk/medic/contactsandpeople/i/isles-anthony-roger-overview_new.html
Crespi & Badcock (C&B) provide a novel hypothesis outlining a role for imprinted genes in mediating brain functions underlying social behaviours. The basic premise is that maternally expressed genes are predicted to promote hypermentalistic behaviours, and paternally expressed genes hypomentalistic behaviours. The authors provide a detailed overview of data supporting their ideas, but as we discuss, caution should be applied in interpreting these data.