vestibular organ

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Related to vestibular organ: vestibular apparatus, vestibular labyrinth

ves·tib·u·lar lab·y·rinth

the portion of the membranous labyrinth concerned with the sense of equilibration (vs. the cochlear labyrinth, which is concerned with the sense of hearing) and innervated by the vestibular nerve; it is located within the semicircular canals and vestibule of the bony labyrinth, and consists of the utricle, saccule, and the semicircular, utriculosaccular, and endolymphatic ducts.

ves·tib·u·lar or·gan

(ves-tib'yū-lăr ōr'găn)
Collective term for the utricle, saccule, and semicircular ducts of the membranous labyrinth; each has a patch of ciliated receptor epithelium innervated by the vestibular nerve.

ves·tib·u·lar lab·y·rinth

(ves-tibyū-lăr labi-rinth) [TA]
Portion of membranous labyrinth concerned with sense of equilibration.
Synonym(s): vestibular organ.


1. pertaining to any vestibule.
2. pertaining to the vestibular organ.

vestibular apparatus
includes the vestibular organ and the vestibular branch of the vestibulocochlear nerve.
canine idiopathic vestibular syndrome
seen in aged dogs, characterized by the sudden onset of head tilt, nystagmus, rolling, falling and circling, often with considerable distress. The cause is unknown, but a peripheral vestibular lesion is suspected. Signs usually regress within a few days. Called also geriatric vestibular syndrome, 'stroke'.
feline vestibular syndrome
an acute onset of head tilt, rolling and nystagmus in cats of all ages. There is usually rapid improvement over a few days. The cause is unknown.
geriatric vestibular syndrome
see canine idiopathic vestibular syndrome (above).
vestibular gland
vestibular membrane
one of the membranes subdividing the osseous labyrinth into three compartments.
vestibular organ
consists of a bony labyrinth containing a membranous labyrinth in the inner ear. Part of the membranous labyrinth is the nonacoustic labyrinth or vestibular organ. The vestibular organ consists of the membranous saccule and utricle and semicircular canals. The semicircular canals contain balance end organs called cristae and the saccule and utricle contain similar end organs called maculae. The organ is essential in the maintenance of the animal's balance.
paradoxical vestibular syndrome
vestibular signs of head tilt and ataxia to the side opposite the lesion. Reported in dogs with tumors of the choroid plexus.
vestibular syndrome
see vestibular ataxia, canine idiopathic vestibular syndrome (above), feline vestibular syndrome (above).
vestibular system
see vestibular apparatus (above).
vestibular window
see oval window.
References in periodicals archive ?
The brain scans revealed differences between the groups in two parts of the brain: an area in the cerebellum where sensory input from the vestibular organs is processed and in the cerebral cortex, which is responsible for the perception of dizziness.
Note that the navigation task stimuli were entirely visual and the subject remained seated throughout; thus, there was no stimulation of the vestibular organs.
7,8) Jones and Corwin have proposed that a subpopulation of cells localized in the supporting cell layer in mammals may be progenitor cells that are responsible for limited hair cell regeneration in vestibular organs such as the utricle.
SLC26A4 is normally found in the cochlea and vestibular organs of the inner ear as well as in the endolymphatic sac, which is a non-sensory part of the inner ear.
The author postulates that the clot in the left internal jugular vein caused an increase in venous pressure that resulted in venous insufficiency in the vestibular organs.
Sensory hair fusion and glycocalyx changes following gentamicin exposure in the guinea pig vestibular organs.

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