system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is happening on a neurological level when you get dizzy?
gpt
If you're talking about dizziness after spinning around loads of times, this is because of a mismatch between your sense of balance and your vision. 

Deep in our ear, we have three channels that have liquid in them. When we move our head around, the liquid in these channels moves around and this allows our brain to keep balance and keep our eyes completely fixed on a point no matter how we move our head. 

After you spin round loads of times, this liquid is still "sloshing around" inside the channels in your ear. These are sending messages to your brain telling you that you're still spinning around even though you're not. Your brain then sends signals to your eyes, trying to make them 'keep up' with the spinning that it thinks is happening, making it seem like the world keeps spinning around. When you try to make a movement with your legs, your brain will send signals to the legs that are modified by your sense of balance, so your legs won't do what you're trying to make them do, e.g. if you want to move your leg forward, your brain thinks that "forward" keeps changing, even though it isn't anymore. 

If you get dizziness without spinning around first, then this is most likely due to a problem in the inner ear where these channels are.