scala vestibuli
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scala vestibuli
[′skā·lə ve′stib·yə·lē] (anatomy)
The uppermost channel of the cochlea; filled with perilymph.
Also found in: Dictionary, Medical, Wikipedia.
References in periodicals archive
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The basal-turn position was characterized by the combination of a diminishing signal in the scala tympani (caused by the electrode) and a persistent fluid signal in the scala vestibuli. Therefore, only one scala is visible, which is a contrast to the regular two-scalar signal (Figures 1(a) and 1(b)).
Furthermore, a scala vestibuli insertion may be attempted (8).
A mechanism of the signal processing by an inner ear is following: an acoustic pressure incoming from an outer ear space excites travelling waves in a fluid space of scala vestibuli first and then these travelling waves subsequently excite travelling waves on the basilar membrane.
The real mammalian cochlea is compound from three fluid spaces (scala media, scala tympani and scala vestibuli) which are mutually divided by two membranes (basilar membrane and Reissner's membrane).
Conversely, if the straightened electrode and stylet are inserted too far beyond the cochleostomy, the electrode tip will contact the outer wall of the first cochlear turn, possibly resulting in damage to the spiral ligament or upward penetration into the scala vestibuli.
This led Kobayashi et alto compare these findings with those observed after instillation of air into the scala vestibuli. [8] They discovered that even a small amount of air in the scala vestibuli resulted in a decrease in the cochlear microphonics, the action potential, and the endocochlear potential.
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