auditory ossicles

(redirected from ear bones)

au·di·to·ry os·si·cles

[TA]
the small bones of the middle ear; they are articulated to form a chain for the transmission of sound from the tympanic membrane to the oval window.

auditory ossicles

Etymology: L, audire + ossiculum, little bone
the malleus, the incus, and the stapes, three small bones in the middle ear that articulate with each other. As the tympanic membrane vibrates, it transmits sound waves through the ossicles to the cochlea.
enlarge picture
Auditory ossicles

auditory ossicles

The 3 diminutive bones of the middle ear. The malleus is attached to the inner face of the tympanic membrane at the manubrium and articulates at its head with the body of the incus; the incus in turn articulates at its lenticular process with the head of the stapes; the stapes is attached at its base by a ligamentous ring to the oval window of the vestibule. Sound waves channelled though the external acoustic canal (auditory duct) to the tympanic membrane are amplified by the auditory ossicles.

The vibrations received at the oval window are passed down the cochlea; the relative movement of the basilar and tectorial membranes leads to deflection of the stereocilia of the hair cells in the organ of Corti, which generates an influx of K+ ions and production of electrical signals that travel via the cochlear nerve to the auditory complex.

au·di·to·ry os·si·cles

(aw'di-tōr-ē os'i-kĕlz) [TA]
The small bones of the middle ear; they are articulated to form a chain for the transmission of sound from the tympanic membrane to the oval window.
Synonym(s): ossicula auditus [TA] , ear bones.

auditory ossicles

The chain of three tiny bone in the middle ear which acts as an impedance transformer, efficiently coupling the relatively large low-impedance movement of the ear drum to the smaller, high-impedance movement of the fluid in the cochlea of the inner ear.

au·di·to·ry os·si·cles

(aw'di-tōr-ē os'i-kĕlz) [TA]
Small bones of middle ear articulated to form a chain for the transmission of sound from the tympanic membrane to the oval window.
Synonym(s): ear bones.

auditory

pertaining to the ear or the sense of hearing.

auditory apparatus
comprises the tympanic membrane, the auditory ossicles that connect the membrane to the oval window to the internal ear, the membranous labyrinth and its contained endolymph, the labyrinth's cochlear duct, the organ of Corti, a specialized sensory epithelium lining the duct, the sensory hair cells of the organ of Corti and the sensory receptors of the auditory nerve that terminate at the base of the hair cells.
auditory bulb
the membranous labyrinth and cochlea.
auditory conditioning signals
sounds used to condition animals to certain procedures or events, such as gathering at the sound of a bell or trumpet, milking to the sound of a radio, whistle signals to a sheep dog.
external auditory meatus
air-filled tubular extension of the auricle leading to the eardrum.
internal auditory meatus
a canal in the petrous temporal bone that accommodates the VIIth and VIIIth cranial nerves.
auditory nerve
the eighth cranial nerve; called also vestibulocochlear nerve and acoustic nerve. See Table 14.
auditory ossicles
the malleus, incus and stapes, the three small bones of the tympanic cavity of the ear. They form a connecting bony system from the tympanic membrane to the oval window that is the opening to the internal ear.
auditory tube
the narrow channel connecting the nasopharynx to the middle ear. See also pharyngotympanic tube.
References in periodicals archive ?
Mooney is quick to note that his team didn't gather enough data to say definitively whether these whales could sense the particle motion present, but the anatomy of whale ear bones suggests that low-frequency vibrations could play a major role in whale hearing.
They were connected by little ear bones," added Daova for SITA.
Unfortunately, the skulls lack teeth so we cannot make direct comparisons with the large teeth known from Denisova Cave, but another similarly-dated fossil from Xujiayao in China does have Neanderthal-like traits in the ear bones, like Xuchang, and does have large teeth, so these may all represent the same population," Chris Stringer, a professor at London's Natural History Museum, who was not involved in the study, told (http://www.
In humans, the task of amplification is performed by the middle ear bones, while frequency analysis is done separately by the cochlear.
Unlike bony fish, such as salmon and cod, sharks don't have ear bones that build up calcified rings that reveal age.
Surgery is also required if the disease leads to complications, which can include facial nerve paralysis, erosion of the middle ear bones, and a labyrinth fistula.
KKTT device must be suitable for at least the adult and children~s teeth, jaws and skull, as well as diagnostic imaging of the ear bones and sinuses.
ISLAMABAD -- Using computer simulation of a fin whale head, scientists have discovered that the skulls of at least some baleen whales have acoustic properties that capture the energy of low frequencies and direct it to their ear bones.
Scientists have documented cases in which whales and dolphins have washed up near seismic testing projects with shattered ear bones and signs of decompression sickness.
Chapter Six describes the diets and foraging strategies of the three species, as well as methods needed to study these parameters, even including photos of the identifiable ear bones of fish that are recovered from scats in dietary analyses.
During an autopsy on the composer, one doctor took his ear During an autopsy on the composer, one doctor took his ear bones, locks of hair were clipped, and when his body was exhumed later in the 1800s, fragments of his skull were taken.