Social and Behavioral Sciences Commons^™

Sexual Dimorphism In 2d:4d Digit Ratio Is Linked To Anxiety In Rhesus Macaques (Macaca Mulatta), Alexander Baxter, E. K. Wood, J. P. Capitanio, J. D. Higley

FHSS Mentored Research Conference

In humans, administering androgens exogenously reduces anxiety. Because prenatal androgen exposure (PAE) has organizational effects on the brain, and because it is higher in males, this may explain why, on average, females are more likely than males to develop anxiety. To assess PAE, the pointer-to-ring-finger digit ratio (2D:4D ratio) is frequently used. Though this phenotype is sexually dimorphic across primate species, preliminary research in a small number of species indicates that PAE's effect on digit ratio may be in the opposite direction when comparing nonhuman primates and humans. in humans, males typically show lower 2D:4D ratios than do females, whereas …