auditory ossicles

(redirected from ossicular chain)

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.
Farlex Partner Medical Dictionary © Farlex 2012

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.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

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.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Ossicular chain defects in safe type of chronic suppurative otitis media.
In our study, we preferred to evaluate the ossicular chain involvement in each case.
This otoendoscopic photograph shows the near total tympanic perforation and mesotympahnic structures, including the round window niche, the pyramidal process with stapedial muscle tendon, the facial nerve, the cochleariform process, and ossicular chain. The pars flaccida and a small portion of the pars tensa with myringosclerosis are preserved.
Information regarding ossicular chain erosion, erosion of LSSC and fallopian canal can also be appreciated by HRCT.
The most commonly reported symptom is unilateral progressive conductive hearing loss induced by ossicular chain compromise [5].
Study exclusion criteria included a history of congenital hearing loss, identification of cholesteatoma or other middle ear mass lesions, identification of ossicular chain discontinuity or destruction, and missing pre- or postoperative audiometric testing.
Myringoplasty is a surgical procedure in which the reconstructive procedure is the repair of tympanic membrane perforation; in this the ossicular chain is intact and mobile and there is no middle ear infection.
The author suggested that this difference resulted from an increased endolymphatic fluid, edema in the middle ear mucosa, disruption of the ossicular chain, or relaxation of ligaments during pregnancy.
The safety and effectiveness of myringoplasty notwithstanding, some adverse events such as infections, bleeding, and ossicular chain injury with hearing impairment can occur.
(1) Tympanoplasty refers to reconstruction of the tympanic membrane defect along with elimination of disease, if any, from the middle ear and reconstruction of ossicular chain if diseased.
Stage of operation Approach Mastoidectomy procedure External auditory canal reconstruction Mastoid Surgery Obliteration of mastoid cavity Access Tympanic membrane (TM) repair Middle ear surgery Ossicular chain repair 3.
Patients in the group with normal CLE had a normal-appearing TM, neotympanum, limited plaques of tympanosclerosis, and mild retractions (according to a modified Sade classification: medial displacement of the pars flaccida and/or pars tensa, without contacting the ossicular chain and without signs of bony erosion).