Vestibular Activity at Experimental Variation of Labyrinthine Pressure

Henriksson, N. G.; Gleisner, L.

doi:10.3109/00016486609127074

Cited by 16 publications

(1 citation statement)

References 3 publications

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“…Depolarization of vestibular nerve cells induced by increase in potassium concentration in the perilymph due to mixture with endolymph is thought to affect vestibular excitability (14). Henriksson et al examined the effect of change in endolymphatic pressure change on the gross activity of the ampullar nerve (15), and found that increasing the endolymphatic pressure increased nerve activity, while decreasing this pressure decreased nerve activity. This result is also considered to be able to explain the directional change in spontaneous nystagmus in Meniere's vertiginous episodes (12).…”

Section: Discussionmentioning

confidence: 99%

Vestibulo-Ocular Reflex in Patients with Meniere's disease Between Attacks

Funabiki

Naito²,

Honjo³

1999

Acta Oto-Laryngologica

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In Meniere's disease, spontaneous nystagmus beating toward the affected ear (ipsilateral nystagmus) is frequently observed especially during vertiginous periods. VOR against horizontal rotation was recorded in 19 patients with Meniere's disease exhibiting ispilateral beating nystagmus, and the dynamic aspect of vestibular function during vertiginous periods was examined by determining VOR gain and directional preponderance (DP). The patients sat on a rotation chair and were passively rotated at about 0.3-0.6 Hz. The maximal head velocity ranged from 80 to 120 deg/s and the duration of rotation from 20 to 30 s. In most patients exhibiting ipsilateral nystagmus, VOR gain toward the affected side was higher than that toward the intact side, indicating that the peripheral vestibular system on the affected side could still respond to head movements and that its dynamic function was increased. This asymmetry disappeared along with disappearance of ipsilateral nystagmus. During the period with contralateral nystagmus, VOR gain toward the affected side became lower than that toward the intact side. These findings indicate that alterations in the dynamic property of the peripheral vestibular system may correlate with the directional change of spontaneous nystagmus. However, the degree of VOR DP (VOR DP%) did not correlate with the slow phase velocity of spontaneous nystagmus, indicating that observation of spontaneous nystagmus alone cannot determine with precision the degree of imbalance in the dynamic aspect of vestibular function.

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Section: Discussionmentioning

confidence: 99%

Vestibulo-Ocular Reflex in Patients with Meniere's disease Between Attacks

Funabiki

Naito²,

Honjo³

1999

Acta Oto-Laryngologica

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Peripheral Mechanisms of Hearing

Dallos

1984

Comprehensive Physiology

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The sections in this article are: Overview and Gross Anatomy Evolution of Ears and Their Variety Evolution of the Inner Ear Evolution of the middle ear Sensory Receptors Cochlear Hair Cells in the Mammal Hair Cells as Transducers Function of Cochlear Hair Cells Events at Receptive Region of Cells Anatomy of Mammalian Cochlear Duct Generation of Receptor Current Micromechanics of Organ of Corti Input to Organ of Corti: Basilar Membrane Mechanics Structure and Properties of Cochlear Canal and Basilar Membrane The Traveling Wave Nonlinearities The Second Filter The Middle and Outer Ear Evolutionary Necessity The Middle Ear The Outer Ear Electrical Signs of Transduction: Cochlear Potentials Recording Methods Intracellular Recording Gross Recording Output of Receptor Cells Transmitter Substances Site of Impulse Initiation Action of Efferent Nerve Fibers Summary Note Added in Proof

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Investigations into the Cause of Canal Paresis in Meniere's Disease

Rizvi

1986

The Laryngoscope

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Since the literature has a paucity of documented lesions of the vestibular hair cells and neurons in Meniere's disease, the cause of canal paresis remains unexplained. A clinicopathological correlation was sought and demonstrated between ampullary distortion of lateral canal and reduced caloric response. The findings in this investigation make a strong case for ampullary distortion disrupting the tenuous but vital cupulary attachment resulting in canal paresis. This concept is attractive because it explains an important clinical event in Meniere's disease on the basis of the only consistent histopathological finding, namely, membrane distension.

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Vestibular Activity at Experimental Variation of Labyrinthine Pressure

Cited by 16 publications

References 3 publications

Vestibulo-Ocular Reflex in Patients with Meniere's disease Between Attacks

Vestibulo-Ocular Reflex in Patients with Meniere's disease Between Attacks

Peripheral Mechanisms of Hearing

Investigations into the Cause of Canal Paresis in Meniere's Disease

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