Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.
the receptor organ of the vestibular portion of the eighth cranial nerve consisting of the three semicircular canals and the otolith, located within the petrous portion of the temporal bone of the cranium.
the inner ear structures that are associated with balance and position sense. They include the vestibule and semicircular canals.
vestibular apparatusThe system of semicircular canals, utricle and saccule in the inner ear, lying within the temporal bone, that provides the functions of hearing and balance.
vestibular apparatusthat part of the inner ear which together with the COCHLEA forms the membranous labyrinth (see EAR).
ves·ti·bu·lar ap·pa·ra·tus(ves-tibyū-lăr ap'ă-ratŭs)
Receptor organ of vestibular portion of eighth cranial nerve consisting of three semicircular canals and the otolith, located within petrous portion of temporal bone of cranium.
1. pertaining to any vestibule.
2. pertaining to the vestibular organ.
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).
see bartholin's glands.
one of the membranes subdividing the osseous labyrinth into three compartments.
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.
see vestibular ataxia, canine idiopathic vestibular syndrome (above), feline vestibular syndrome (above).
see vestibular apparatus (above).
see oval window.