membranous labyrinth


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Related to membranous labyrinth: osseous labyrinth, bony labyrinth

mem·bra·nous lab·y·rinth

[TA]
a complex arrangement of communicating membranous canaliculi and sacs, filled with endolymph and surrounded by perilymph, suspended within the cavity of the bony labyrinth; its chief divisions are the cochlear duct and the vestibular labyrinth.
Synonym(s): labyrinthus membranaceus [TA]

membranous labyrinth

n.
The fluid-filled membranous sacs of the inner ear that are associated with the senses of hearing and balance.

membranous labyrinth

Etymology: L, membrana + labyrinthos, a maze
a network of three fluid-filled membranous semicircular ducts suspended within the bony semicircular canals of the inner ear, associated with the sense of balance. The ducts, which contain endolymph, follow the contours of the bony canals and are about one fourth of the diameter of the canals.

membranous labyrinth

A system of communicating ducts and sacs filled with endolymph cushioned by perilymph in the bony labyrinth of the inner ear.

Components membranous labyrinth:
• Cochlea, which houses the sensory part of the auditory system;
• Semicircular canals, which is sensitive to rotatory movement; and
• Vestibule, which contains the sacculus and utriculus (sensitive to linear movement).

mem·bra·nous lab·y·rinth

(mem'bră-nŭs lab'i-rinth) [TA]
A complex arrangement of communicating membranous canaliculi and sacs, filled with endolymph and surrounded by perilymph, suspended within the cavity of the bony labyrinth; its chief divisions are the cochlear labyrinth and the vestibular labyrinth.

membranous labyrinth

see EAR.

mem·bra·nous lab·y·rinth

(mem'bră-nŭs lab'i-rinth) [TA]
Complex arrangement of communicating membranous canaliculi and sacs, filled with endolymph and surrounded by perilymph, suspended within cavity of the bony labyrinth.

labyrinth

the system of interconnecting cavities or canals of the internal ear, consisting of the vestibule, cochlea and semicircular canals.
The cochlea is concerned with hearing, and the vestibule and semicircular canals with equilibrium (sense of balance).

bony labyrinth
the bony or osseous labyrinth is composed of a series of canals tunneled out of the temporal bone.
ethmoid labyrinth, ethmoidal labyrinth
either of the paired lateral masses of the ethmoid bone, consisting of numerous thin-walled cellular cavities, the ethmoidal cells.
membranous labyrinth
inside the osseous labyrinth is the membranous labyrinth, which conforms to the general shape of the osseous labyrinth but is smaller. A fluid called perilymph fills the space between the osseous and membranous labyrinths. Fluid inside the membranous labyrinth is called endolymph. These fluids play an important role in the transmission of sound waves and the maintenance of body balance.
osseous labyrinth
a complex excavation in the petrous part of the temporal bone which houses the membranous labyrinth.
References in periodicals archive ?
Magnetic resonance imaging (MRI) of the right ear demonstrated a complete obliteration of the membranous labyrinth (figure 2).
From a more global perspective, the utility of pharmacologic manipulation of the membranous labyrinth might play a considerable role in the treatment of a variety of otologic disorders.
3,6] One is a disruption of the otic capsule and membranous labyrinth by a temporal bone fracture.
The hallmark of all types of labyrinthitis on magnetic resonance imaging (MRJ) is enhancement of the membranous labyrinth on T1-weighted images following the administration of intravenous contrast medium (gadolinium).

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