| Scala tympani | |
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| Interior of right osseous labyrinth. (Scala tympani labeled at right, inside cochlea. The cochlea is the auditory portion of the Inner ear. Its core component is the Organ of Corti, the sensory organ of hearing, which is distributed along | |
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| Cross section of the cochlea. (Scala tympani labeled at bottom, spelled as 'scala timpani'. ) | |
| Gray's | subject #232 1050 |
| MeSH | Scala+Tympani |
| Dorlands/Elsevier | s_03/12721078 |
Scala tympani is the name of one of the perilymph filled cavities in the cochlear labyrinth. the Peripheral organs of the Special senses the organs of Taste ( Peripheral gustatory or Medical Subject Headings ( MeSH) is a huge Controlled vocabulary (or metadata system for the purpose of indexing journal articles and books Elsevier, the world's largest Publisher of Medical and Scientific literature, forms part of the Reed Elsevier group Perilymph is an extracellular fluid located within the Cochlea (part of the Ear) in 2 of its 3 compartments the Scala tympani and Scala vestibuli It is separated from the scala media by the basilar membrane, and it extends from the round window to the helicotrema, where it continues as scala vestibuli. The cochlear duct (or scala media) is an Endolymph filled cavity inside the Cochlea, located in between the Scala tympani and the Scala The basilar membrane within the Cochlea of the Inner ear is a stiff structural element that separates two liquid-filled tubes that run along the coil of the cochlea The round window is one of two openings that connect the Inner ear to the Middle ear. The helicotrema (from Greek ἕλιξ meaning coil and τρη̂μα meaning hole is the part of the Cochlear labyrinth where the Scala Scala vestibuli is a Perilymph filled cavity inside the Cochlea of the Inner ear.
The purpose of the perilymph filled scala tympani and scala vestibuli is to transduce the movement of air that causes the tympanic membrane and the ossicles to vibrate, to movement of liquid which, depending of frequency, causes the basilar membrane to reach a peak amplitude at a specific site. The tympanic membrane (also tympanum or myrinx is a thin membrane that separates the External ear from the Middle ear. The ossicles (also called auditory ossicles) are the three smallest Bones in the human body This movement is conveyed to the organ of Corti inside the scala media, composed of hair cells attached to the basilar membrane and their sterocilia embedded in the tectorial membrane. The organ of Corti (or spiral organ) is the organ in the Inner ear of Mammals that contains auditory sensory cells or " Hair cells " The movement of the basilar membrane compared to the static tectorial membrane causes the sterocilia to bend. They then depolarise and send impulses to the brain via the cochlear nerve. This produces the sensation of sound. Sound' is Vibration transmitted through a Solid, Liquid, or Gas; particularly sound means those vibrations composed of Frequencies
Additional images
 Transverse section of the cochlear duct of a fetal cat. |
 The cochlea and vestibule, viewed from above. |
 Diagrammatic longitudinal section of the cochlea. |
External links
- Slide from University of Kansas
- Diagram at IUPUI
- Scala+tympani at eMedicine Dictionary
- Image at University of New England, Maine
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