Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

[Heat and vestibular stimulation].

G Sierra Galera1, F Fernández Díaz, J M Roquette Gaona

  • 1Universidad de Cádiz, Cátedra y Servicio de O.R.L. del Hospital Universitario de Puerto Real (SAS).

Anales Otorrinolaringologicos Ibero-Americanos
|October 16, 1999
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Postural control according to the age in patients with benign paroxysmal positional vertigo.

Revue de laryngologie - otologie - rhinologie·2006
Same author

[Postural control related to age in patients with benign positional paroxysmal vertigo].

Acta otorrinolaringologica espanola·2005
Same author

[Results of supraglottic laryngeal cancer treatment with endoscopic surgery using CO2 laser].

Acta otorrinolaringologica espanola·2004
Same author

[Polymorphic reticulosis of the rhinopharynx].

Anales otorrinolaringologicos ibero-americanos·1999
Same author

[Head-thrust test: its validity as a diagnostic clinical test].

Anales otorrinolaringologicos ibero-americanos·1999
Same author

[Epithelial-myoepithelial carcinoma of smaller salivary gland].

Anales otorrinolaringologicos ibero-americanos·1999

Caloric testing uses temperature changes to stimulate the vestibular system, causing nystagmus. This study suggests convection currents are insufficient to explain the observed vestibular stimulation during caloric tests.

Area of Science:

  • Vestibular system physiology
  • Otolaryngology
  • Neuroscience

Context:

  • The Barany caloric test, a standard diagnostic tool, induces nystagmus via ear irrigation.
  • The prevailing theory attributes this to convection currents within the horizontal semicircular canal.
  • Recent research, including Skylab experiments, has questioned the adequacy of this explanation.

Purpose:

  • To re-evaluate the mechanisms responsible for vestibular stimulation during caloric tests.
  • To assess the thermal gradients required for convection or endolymph expansion to induce nystagmus.
  • To determine if existing thermal gradients in caloric tests are sufficient to support convection-driven vestibular responses.

Summary:

  • Calculations indicate that thermal gradients during standard caloric tests are too small to generate significant convection currents.

Related Experiment Videos

  • The energy required for convection or endolymph expansion to elicit vestibular responses likely exceeds that produced by typical caloric irrigation.
  • This challenges the long-held convection current hypothesis for caloric nystagmus.

    • Impact:

    • Suggests a need for revised understanding of the physics behind caloric vestibular stimulation.
    • May lead to modifications in diagnostic protocols for vestibular disorders.
    • Highlights the importance of precise thermal gradient measurements in vestibular research.