🧠 1. Predicts the Future Constantly Pathophysiology (simple): The brain uses predictive coding — comparing incoming sensory input with internal models to anticipate the next moment. This happens in milliseconds across the visual and motor cortex, so actions feel instant. Reference: Friston K. (2005). A theory of cortical responses. Philosophical Transactions of the Royal Society B. ⸻ 🌙 2. Cleans Itself While You Sleep Pathophysiology (simple): During sleep, the glymphatic system (glial lymph