How does the inner ear help you keep your balance?

The vestibular system in the inner ear contains three semicircular canals that sense rotation and two otolith organs that detect linear motion and gravity. When your head moves, fluid shifts and tiny hair cells bend, turning movement into nerve signals. The brain combines this information with vision and signals from muscles and joints to keep you upright. That is why balance can feel shaky if you spin around, get motion sickness, or have an inner ear infection. The system is essential for walking, reading while moving, and looking steady when your head turns.