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cupula |
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cupula /cu·pu·la/ (koo´pu-lah) pl. cu´pulae [L.] a small, inverted cup or dome-shaped cap over a structure.cu´pular
cupula pl. cupulae [L.] a small, inverted cup or dome-shaped cap over a structure. diaphragmatic cupula the ventral dome of the diaphragm. pleural cupula the apex of each pleural sac lying at the cranial aperture of the thorax. |
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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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