otic capsule


Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.

o·tic cap·sule

the cartilage capsule surrounding the internal ear mechanism; in elasmobranchs, it remains cartilaginous in the adult; in the embryos of higher vertebrates, it is cartilaginous at first but later becomes bony (at approximately 23 weeks in humans).
Synonym(s): auditory capsule

o·tic cap·sule

(ō'tik kap'sŭl)
The cartilage that, in the embryo, surrounds the developing otic vesicle and develops into the bony labyrinth of the internal ear.
Synonym(s): auditory capsule.

otic capsule

The cartilaginous capsule that develops in the embryonic skull to enclose the ear.
See also: capsule

otic

pertaining to the ear; aural.

otic capsule
cartilaginous envelope which surrounds the nervous elements of the embryo's inner ear, and which subsequently ossifies.
otic cup
the invagination of the otic placode, destined to form an otic vesicle and ultimately the inner ear.
References in periodicals archive ?
Cochlear otospongiosis occurs in the otic capsule surrounding the cochlea.
In this stage, the ossification of otic capsule, occipital arch and basal plate is more advanced than Mabuya sp.
The horizontal portion of the facial nerve can be distinctly seen adjacent to the developing otic capsule.
For example, the exit for cranial nerve VII passes anterior to the otic capsule through a space (incisura pro otica) left by the growth upward and backward of the parachordals to form the acrochordal plate contacting the otic capsule.
Under this hypothesis, (1) Meckel's cartilage was solely responsible for the head and neck of the malleus, and the body and short process of the incus; (2) Reichert's cartilage was responsible for the handle of the malleus, the long process of the incus, the crura, and the lateral stapedial footplate; and (3) the otic capsule was responsible for the medial stapedial footplate.
In the early 1980s, nonossicular homograft otic capsule bone was used as a prosthetic material in stapedectomy.
3,6] One is a disruption of the otic capsule and membranous labyrinth by a temporal bone fracture.