[Oculomotor response to the vertical cephalic autorotatory test in patients with benign paroxistic positional vertigo of the posterior canal]. / Respuesta oculomotora al test de autorrotación cefálica vertical en pacientes con vértigo posicional paroxístico benigno del conducto posterior.
Acta Otorrinolaringol Esp
; 57(5): 210-6, 2006 May.
Article
em Es
| MEDLINE
| ID: mdl-16768198
ABSTRACT
OBJECTIVE:
To evaluate the eye movement response to the head auto-rotation test (HART) in the vertical plane in patients with benign paroxysmal positional vertigo.DESIGN:
A transversal, descriptive study. SETTING UP Outpatient clinic in a general Hospital. INDIVIDUALS 34 posterior canal BPPV cases with a video-oculographic diagnosis, older than 18 years old, 7 of them were not able to perform the HART. INTERVENTION HART was performed by a an electrooculographic system with simultaneous recording of head movement by an acelerometer in the vertical plane (Vorteq, Micromedical Instruments). The HART with eyes fixation was performed 3 times to determine its reliability. MAIN OUTCOMEMEASURES:
Gain, asymmetry and phase for the vertical VOR respectively. A statistical analysis was carried out to determine the test reliability and the number of individuals with an abnormal result.RESULTS:
Gain is the only variable that showed a reproducible result in the HART for the active head movement at 1-2 Hz (test-retest reliability 0.83-0.89). The values of gain showed a moderate correlation at the frequencies 1-3 Hz (correlation 0.60-0.87). Asymmetry and phase were not reproducible variables (correlation < 0.55). Thirteen of 27 (48%) patients presented a decrease of the vertical gain, another 13 showed normal values and one case showed raised values.CONCLUSION:
Gain is the only useful variable in the vertical HART. Forty-eight percent of patients with posterior canal BPPV have a reduced vertical gain, suggesting an impairment of inferior vestibular nerve function.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Vertigem
/
Movimentos da Cabeça
/
Movimentos Oculares
Tipo de estudo:
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Limite:
Adult
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Aged
/
Aged80
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Female
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Humans
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Male
/
Middle aged
Idioma:
Es
Revista:
Acta Otorrinolaringol Esp
Ano de publicação:
2006
Tipo de documento:
Article