What is the function of the semi-circular canal?

The semi-circular canals are structures located in the inner ear, and their primary function is to maintain balance and spatial orientation. They are filled with a fluid called endolymph and contain sensory hair cells that respond to the movement of this fluid when the head moves. As the head moves in different directions, the fluid shifts within the canals, stimulating the hair cells that send signals to the brain about the body's position in space. This information is crucial for coordinating balance and posture.

While hearing and sound amplification are functions related to different parts of the ear, such as the cochlea and the middle ear structures, the semi-circular canals specifically do not have a direct role in these processes. Instead, their role is crucial in helping individuals maintain stability and balance, particularly during movement or changes in head position.