Why do benign paroxysmal positional vertigo episodes recover spontaneously?
J Vestib Res
; 8(4): 325-9, 1998.
Article
en En
| MEDLINE
| ID: mdl-9652482
It is well known that most episodes of benign paroxysmal positional vertigo (BPPV), even in untreated, recover spontaneously in 2 to 6 weeks. In the present study, we put forward the hypothesis that this is mainly due to the fact that endolymph, owing to its low calcium content (20 microM) is able to dissolve otoconia. To support this, the fate of frog saccular otoconia immersed in normal endolymph (Ca2+ content 20 microM) and in Ca2+-rich endolymphatic fluids (up to 500 microM) was studied by observing the crystals at regular intervals for 3 weeks. The results demonstrated that normal endolymph can dissolve otoconia very rapidly (in about 20 hours). When the endolymphatic Ca2+ content was increased (50 to 200 microM) otoconia dissolution time was slowed down (about 100 to 130 hours, respectively) and completely stopped when the endolymphatic Ca2+ content was of 500 microM. The present results therefore suggest that the major process involved in the spontaneous recovery of BPPV episodes is the capability of the endolymph to dissolve dislodged otoconia.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Vértigo
Límite:
Animals
Idioma:
En
Revista:
J Vestib Res
Asunto de la revista:
OTORRINOLARINGOLOGIA
Año:
1998
Tipo del documento:
Article
País de afiliación:
Italia