When you spin in a chair and feel the motion intensely, what is happening inside your inner ear?

Answer

Inner ear fluid is being sloshed around, signaling the change in motion

The intense sensation felt when spinning in a chair is due to the fluid in the inner ear being physically sloshed around, which signals the change in rotational motion to the brain.

When you spin in a chair and feel the motion intensely, what is happening inside your inner ear?
physicsEarthrotationmotionperception