Ossicles


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Related to Ossicles: cochlea

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.

Ossicles

The three small bones of the middle ear: the malleus (hammer), the incus (anvil) and the stapes (stirrup). These bones help carry sound from the eardrum to the inner ear.
Mentioned in: Otitis Media, Stapedectomy

ossicles

accessory bones (see Table 1); accessory ossicles are subject to the same range of trauma or pathologies as constant (skeletal) bones
Table 1: Accessory bones in the foot
Accessory bone in the footLocation
Os tibiale externum (accessory navicular)Within tibialis posterior tendon, adjacent to proximal part of navicular tuberosity
Os trigonumPosterior margin of talus
Os peroneumWithin peroneus longus tendon, adjacent to inferior lateral border of cuboid/calcaneocuboid joint
Os vesalianumAdjacent to fifth metatarsal base
Os intermetatarseumBetween bases of first and second metatarsals
Os interphalangeusWithin insertion of flexor hallucis longus tendon, adjacent to plantar area of hallux interphalangeal joint
References in periodicals archive ?
In archaeology, fish ossicles can reveal which fishes were used by ancient settlers, allow the estimation of the length and weight of those fishes, and indicate the season of capture as supposed by Slyke (1998).
The scutum, ossicles, and tegmen tympani are common sites for erosion.
As mentioned, the three recognized causes of SNHL after tympanoplasty are acoustic trauma from manipulation of the ossicles, the noise generated by suctioning and, in the case of mastoidectomy, the noise generated by temporal bone drilling; their effect can be cumulative.
The location of the mass deep to the scleral ossicles made fine-needle aspiration impossible; therefore, the periorbital skin was clipped and aseptically prepared for a surgical approach.
In the case of the cartilage AC pathway, airborne sounds from the fibrotic tissue have to vibrate the ossicles without the tympanic membrane.
In contrast to the malleus, the two other ear ossicles, the incus and stapes, appear more similar to chimpanzees, gorillas and orangutans.
Destruction of the ossicles and sclerosis of the mastoid air cells, extensive bony erosion, and extension into the middle cranial fossa are rare complications documented in the literature.
From the tympanic membrane, the vibration are picked up by the three ossicles of the middle ear and transmitted to the inner ear.
Infections or blockages of the ear can be treated and cleared, eardrums can be repaired surgically, and ossicles affected by otosclerosis can be replaced with artificial bones.
As goniasterids are most often prone to immediate postmortem disarticulation, their remains typically consist of isolated ossicles, although a few articulated and partial fossil specimens are known from the Southeast.
The role of practice is especially significant in mastoidectomy as the surgeon is working in the immediate vicinity of minute, multifaceted and delicate structures such as auditory ossicles, lamellar bone, blood vessels and nerves.