Scala vestibuli
Scala vestibuli
Scala vestibuli (pronunciation: /ˈskeɪlə vɛstɪˈbjuːliː/), also known as the vestibular duct, is a part of the cochlea in the inner ear. The term "scala vestibuli" is derived from the Latin words "scala" meaning "staircase" and "vestibuli" meaning "of the vestibule", referring to its location and structure.
Anatomy
The scala vestibuli is located above the scala media and below the scala tympani. It is separated from the scala media by Reissner's membrane and from the scala tympani by the vestibular membrane. The scala vestibuli is filled with perilymph, a fluid that plays a crucial role in the transmission of sound vibrations.
Function
The scala vestibuli is involved in the process of hearing. When sound waves enter the ear, they cause the stapes to push on the oval window, creating pressure waves in the perilymph of the scala vestibuli. These waves travel through the cochlea, stimulating the hair cells in the scala media, which then send signals to the brain via the auditory nerve.
Related Terms
- Cochlea: The spiral-shaped part of the inner ear that is involved in hearing.
- Scala media: The middle chamber of the cochlea, located between the scala vestibuli and the scala tympani.
- Scala tympani: The lower chamber of the cochlea, located below the scala media and scala vestibuli.
- Perilymph: The fluid that fills the scala vestibuli and scala tympani.
- Reissner's membrane: The membrane that separates the scala vestibuli from the scala media.
- Vestibular membrane: The membrane that separates the scala vestibuli from the scala tympani.
- Stapes: The smallest bone in the human body, located in the middle ear. It transmits sound vibrations from the eardrum to the inner ear.
- Oval window: A membrane-covered opening that leads from the middle ear to the scala vestibuli of the cochlea.
- Hair cells: The sensory cells in the cochlea that convert sound vibrations into electrical signals.
- Auditory nerve: The nerve that carries signals from the cochlea to the brain.
External links
- Medical encyclopedia article on Scala vestibuli
- Wikipedia's article - Scala vestibuli
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