When you see the apple, your brain's motor center activates the appropriate muscles, allowing you to reach out with your arm, grab it with your hand, bend your elbow joint, and bring it to your mouth.
Kad vidiš jabuku, motorni centri u mozgu aktiviraju odgovarajuće mišiće, tako da možeš posegnuti rukom, dohvatiti jabuku šakom, saviti lakat i približiti jabuku ustima.