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cupula |
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cupula [ˈkʌpjʊlə] n pl -lae [-liː] (Life Sciences & Allied Applications / Anatomy) (Life Sciences & Allied Applications / Zoology) Anatomy Zoology a dome-shaped structure, esp the sensory structure within the semicircular canals of the ear How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The cupulolithiasis theory holds that BPPV is caused by the presence of otoconial debris that adheres to the cupula of the posterior semicircular canal. In the presence of gravity, this temperature gradient results in the convective flow of endolymph that deflects the cupula and generates nystagmus. Rotation of the head causes a flow of fluid, which in turn causes displacement of the top portion of the hair cells that are embedded in the jelly-like cupula. |
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