modulation it's there's a whole cottage industry of like my son trackballs when they run versus when they don't run and and basically there's more information about whether the running or not then there seems to be about the visual system that's sort of like a first approximation but but a lot of the there's been a sort of a dichotomy of people who are either either think you know maybe this is a predictive process and kind of thing versus people who think it's more of like an arousal sort of like when the animals running they're