stapes n : the stirrup-shaped ossicle that transmits sound from the incus to the cochlea [syn: stirrup] [also: stapedes (pl)]
The stapes or stirrup is the stirrup-shaped small bone or ossicle in the middle ear which attaches the incus to the fenestra ovalis, the "oval window" which is adjacent to the vestibule of the inner ear. It is the smallest and lightest bone in the human body.
The stapes transmits the sound vibrations from the incus to the membrane of the inner ear inside the fenestra ovalis. The stapes is also stabilized by the stapedius muscle, which is innervated by the facial nerve.
In non-mammalian vertebrates, the bone homologous to the stapes is usually called the columella; however, in reptiles, either term may be used.
- Vallejo-Valdezate LA, Martín-Gil J, José-Yacamán M, Martín-Gil FJ, Gil-Carcedo LM. "Scanning electron microscopy images and energy-dispersive X-ray microanalysis of the stapes in otosclerosis and van der Hoeve syndrome". Laryngoscope. 2000 Sep;110(9):1505-10.
stapes in Arabic: عظمة الركاب
stapes in Catalan: Estrep (os)
stapes in Danish: Stigbøjle (knogle)
stapes in German: Steigbügel (Anatomie)
stapes in Spanish: Estribo (hueso)
stapes in Esperanto: Piedingo (anatomio)
stapes in French: Stapes
stapes in Croatian: Stremen
stapes in Indonesian: Tulang sanggurdi
stapes in Italian: Staffa (anatomia)
stapes in Latin: Stapes (os)
stapes in Dutch: Stijgbeugel (gehoorbeentje)
stapes in Polish: Strzemiączko
stapes in Portuguese: Estribo (osso)
stapes in Russian: Стремя (анатомия)
stapes in Slovak: Strmienok
stapes in Finnish: Jalustinluu
stapes in Swedish: Stigbygeln
stapes in Thai: กระดูกโกลน
stapes in Chinese: 镫骨
Eustachian tube, anvil, auditory apparatus, auditory canal, auditory meatus, auditory nerve, auditory ossicles, auditory tube, auricle, basilar membrane, bony labyrinth, cauliflower ear, cochlea, conch, concha, drumhead, ear, ear lobe, eardrum, endolymph, external ear, hammer, incus, inner ear, lobe, lobule, lug, malleus, mastoid process, middle ear, organ of Corti, outer ear, oval window, perilymph, pinna, round window, secondary eardrum, semicircular canals, shell, stirrup, tympanic cavity, tympanic membrane, tympanum, vestibule