To meet the goal of improving neurological health for all, neurology needs to evolve beyond binary categorisations of sex and gender. Most of the limited neurological research in transgender and gender-diverse individuals has been in transgender men and transgender women,1 reinforcing a binary structure of gender and ignoring millions of individuals worldwide who identify outside binary gender, such as nonbinary or agender people.2,3 Similarly, in sex-based neurological research, the intenĀtional inclusion of intersex people is near non-existent.