1,720,990 research outputs found
Improving the quality of life in patients with vestibular disorders: the role of medical treatments and physical rehabilitation.
No full textRuolo di un preparato imunostimolante costituito da frazioni ribosomiali batteriche e da proteoglicani di membrana di K. pneumoniae nella prevenzione delle infezioni respiratorie e otorinolaringoiatriche
No full textA microrefractometric study of dry mass changes in isoproterenol enlarged salivary glands of the rat.
No full textMorphofunctional changes after drug treatment in the ra
Why do benign paroxysmal positional vertigo episodes recover spontaneously?
No full textIt 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
Nouvaux supports informatisés à l'exploration de la fonction vestibulaire: I. Les systèmes experts et leur applications cliniques
No full textNouvaux supports informatisés à l'exploration de la fonction vestibulaire: II. Un système expert pour la classification des vertiges.
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Quantification of vestibular compensation in unilateral Meniere’s disease
No full textThe main parameters of the vestibulo-ocular reflex (i.e. the gain or reflectivity, the long-time constant of the semicircular canals, the time constant of the mechano-neural transduction, and that of the central leaky integrator) were computed from the post-rotational nystagmic responses of unilateral Meniere's patients. Comparison with normal subjects showed a decrease of the first two parameters both in CW and CCW responses. No significant changes were observed in the remaining parameters. Probably due to a process of central compensation, a high level of symmetry was observed mainly in longstanding patients
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