When the brain tracks time, it must decide whether its regions should rely on a shared timing signal or tack time separately. Two Regions, Two Kinds of MistakesThe neurons fired in sequence in each brain area, with different cells becoming active at different times. These independent errors suggested that one region could temporarily maintain a different timing representation from the other. If the brain regions were just randomly out of sync, you’d expect the ratio to change. The findings challenge the idea that brain regions rely on a single synchronized timing system.