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Secondary tympanic membrane

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Title: Secondary tympanic membrane  
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Subject: Round window, Ear, Auditory system, Auditory and vestibular anatomy, Organ of Corti
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Secondary tympanic membrane

Secondary tympanic membrane
Details
Latin membrana tympani secundaria
membrana fenestra cochleae
membrana fenetra rotundum
Anatomical terminology

The secondary tympanic membrane (or round window membrane) covers the round window, sealing off one of two openings into the inner ear. It separates the scala tympani of the cochlea from the middle ear. It vibrates with opposite phase to vibrations entering the cochlea through the oval window as the fluid in the cochlea is displaced when pressed by the stapes at the oval window. This ensures that hair cells of the basilar membrane will be stimulated and that audition will occur.

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