Question

Which structure helps a person to maintain equilibrium?

• A. Cochlea
• B. Eustachian tube
• C. Semicircular canals
• D. Hammer like bone

Answer 1

The correct option is C Semicircular canals

The semicircular canals are three canals used to provide information to the brain on directional balance. Each canal is lined with cilia and filled with fluid, called as endolymph. As the head and body move, the fluid moves and pushes the cilia back and forth to create a motion sensor. The three main parts of the semicircular canals are the horizontal, posterior and superior. The superior is responsible for head rotation, the posterior canal detects movement and rotation on the sagittal plane, and the horizontal senses on a vertical basis.