Oval window
The stapes pushes against the opening and causes the fluid in the inner ear to move
The oval window is a small, oval-shaped opening located in the inner ear of mammals, including humans. It is covered by a thin, elastic membrane that separates the middle ear from the inner ear. The oval window is situated beneath the stapes bone, one of the three small bones in the middle ear that transmit sound vibrations from the eardrum to the inner ear.
The main function of the oval window is to transfer sound energy from the air in the middle ear to the fluid-filled cochlea of the inner ear. When sound waves cause the eardrum to vibrate, the ossicles – the three small bones in the middle ear – amplify and transmit the vibrations to the oval window. The oval window then passes the vibrations to the cochlea, which is responsible for transforming sound wave vibrations into electrical signals that are sent to the brain for interpretation and perception as sound.
The size of the oval window is important in hearing function since a larger oval window will transfer more sound energy to the cochlea. Certain medical conditions can affect the size and shape of the oval window, which may cause hearing loss or other ear-related problems. Some surgeries, such as stapedectomy, involve the removal of a portion of the oval window membrane to improve hearing in cases where the stapes bone is damaged or fixed in position.
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