 The study found that head orientation is more variable when it comes to pitch compared to roll, and that there is an overrepresentation of downward head pitch. This suggests that people tend to look downwards while walking or running, which could have implications for models of vestibular processing. Additionally, the study showed that gravitational and inertial acceleration are similar, but differ in terms of their relative power at different frequencies. This provides insight into how vestibular processing works, and could help inform future research. This article was authored by Christian B. Sinott, Peter A. Hausman, and Paul R. McNeillidge.