scala tympani


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Related to scala tympani: Scala media, scala vestibuli, vestibular membrane

scala

 [ska´lah] (L.)
a ladderlike structure, especially any of various passages of the cochlea.
scala me´dia cochlear duct.
scala tym´pani the part of the cochlea below the spiral lamina.
scala vesti´buli the part of the cochlea above the spiral lamina.

sca·la tym·'pa·ni

[TA]
the division of the spiral canal of the cochlea lying on the basal side of the spiral lamina.

scala tympani

(tĭm′pə-nī′)
n. pl. scalae tympanorum (-nôr′əm)
The lowermost of the three divisions of the spiral cavity winding around the modiolus of the cochlea in the inner ear. It is filled with perilymph and transmits sound vibrations from the scala vestibuli, with which it is contiguous at the apex of the cochlea.

sca·la tym·pa·ni

(skā'lă tim'păn-ī) [TA]
The division of the spiral canal of the cochlea lying on the basal side of the spiral lamina.

scala tympani

A fluid-filled passage in the cochlea running on the outside of the cochlear duct from the tip of the basilar membrane at the HELICOTREMA to the round window in the middle ear where it communicates with the scala verstibuli.

scala tympani

the lower chamber of the cochlea in mammals, filled with perilymph which ends in the fenestra rotunda. It connects with the scala vestibuli via the helicotrema.
References in periodicals archive ?
Translocation of the electrode array from scala tympani to scala vestibuli will not only result in loss of any remaining residual hearing, but it will also result in poorer hearing outcomes with electrical stimulation [1].
Dexamethasone concentration gradients along scala tympani after application to the round window membrane.
The basal turn of the cochlea was widely opened, and the fluid at the scala tympani of the basal turn was maintained only at a level to moisten the BM.
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.
Our findings demonstrated that mIESCs have the potential to migrate into the injured cochlea because they were found in other scalae (vestibuli and media) in addition to the scala tympani. Migration from the scala tympani to vestibuli could be attributable to the flow of perilymph (33).
(8.) Kiefer J, Weber A, Pfennigdorff T, von Ilberg C.: Scala vestibule insertion in cochlear implantation: a valuable alternative for cases with obstructed scala tympani. ORL J Otorhinolaryngol Relat Spec Sep-Ocl 2000; 62(5):251-6
The model findings were then evaluated in the experimental animal with comparisons of current distributions in the terminal auditory nerve fibers for monopolar as well as bipolar stimulation in the scala tympani (Figure 5) and between electrodes placed in the scala tympani and the scala vestibuli.
Microanatomical examination of the temporal bones using micro-computed tomography (CT) [14] has revealed that the dimensions of the scala tympani markedly reduce after 450[degrees].
Spots of IBA1+ cells were detected on the undersurface of the basilar membrane in the scala tympani and the stria vascularis (Figure 1, arrows) and were abundantly present at the endosteal layer of the cochlea, especially at the early postnatal stages (Figure 1, asterisks).
Although they are of equivalent or longer length than the standard electrodes, they travel a greater span of distance since their position is on the outside wall of the scala tympani. They do not necessarily go farther into the cochlea.
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).
Three widely accepted goals for the development of future CI electrode arrays are (1) deeper insertion into the scala tympani (ST) to access lower frequency cochlear neurons; (2) greater operating efficiency, defined as a reduction in the stimulus charge required to produce a comfortable loudness level; and (3) reduced intracochlear damage associated with surgical insertion.