system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can I think about moving my body, but not move it? What's the difference between thinking about moving a body part, and actually moving it?
gpt
It's because the parts of your brain that processes though/cognition are separate from the part that controls movement (the motor cortex). Only when the two communicate are the appropriate messages sent to your muscles to force movement. As an interesting side note, there is evidence that simply thinking about performing an action can make you better at said action.