Stapes


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stapes

[′stā·pēz]
(anatomy)
The stirrup-shaped middle-ear ossicle, articulating with the incus and the oval window. Also known as columella.

Stapes

 

(1) The innermost auditory ossicle of the middle ear in man and most other mammals. Together with the malleus (hammer) and incus (anvil), the stapes participates in the transmission of sound into the inner ear. The bony plate at the base of the stapes is situated in the oval window of the vestibule of the cochlea, which is found on the inner wall of the tympanic cavity. Two thin crura depart from the base of the stapes and unite to form the stapedial arch. The head of the stapes, which articulates with the incus, is found at the apex of the arch.

In many mammals the stapes resembles a stirrup, hence the common name of the bone.

(2) The only auditory ossicle in most amphibians and in all reptiles and birds. The term “columella” is also used in reference to the ossicle.

References in periodicals archive ?
5) They found that radiologic evidence of an enlargement of the cochlear aqueduct is not a relevant finding in cases of stapes gushers and transotic CSF leaks.
Stapes fixation, cholesteatoma involvement of the malleus, ineligible mucosal inflammation, wet middle ear, and accompanying bony canalplasty were the intraoperative exclusion criteria for this study and were checked from operation notes.
Stapes superstructures were removed by crural scissors and stapes footplate was perforated by microdrill.
This indicates the importance of the articulation of the stapes on the oval window in the pathogenesis of the hearing loss in these cases.
Given Stapes recognition of the difficulty, if not impossibility, of coming directly at the elusive, enigmatic Conrad, impressionism becomes an important factor in Several Lives.
Patients in Group A underwent stapedotomy in which a small fenestra was made in foot-plate of stapes using micro drill.
About 100 surgeons are credentialed to practice at McKenzie Surgery Center, with 40 to 50 doing surgeries there at least once a month, Stapes said.
Whether they'll get it from Stars & Stapes is unfortunately an open question.
They may be fragile or malformed, or the foot plate of the stapes may become fixed and rigid and no longer capable of transmitting sound effectively to the inner ear.
The middle ear contains three tiny bones, the malleus, incus, and stapes, which transmit sound from the eardrum to the inner ear.
The ear drum triggers vibrations in three tiny bones - the stapes, inchus and malleus - and the vibrations travel through fluid in the cochlea.
These three bones are named the malleus, incus, and stapes (and are also known as the hammer, anvil, and stirrup).