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Visual gravitational vertical perception in peripheral vestibular hypofunction.
MedLine Citation:
PMID:  22073979     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Abstract Conclusions: Rise time in the estimation of the gravitational vertical in the head tilt response (HTR) test is increased in patients with peripheral vestibular lesions and residual chronic dizziness. Objective: Assessment of the perception of the gravitational vertical in patients with peripheral vestibular lesions through the HTR. Methods: HTR was studied in 12 patients with peripheral vestibular lesion, 8 clinically with chronic dizziness and 4 without it; 23 normal subjects were studied as control group. Two parameters of the HTR were assessed, rise time and steady-state error to characterize a dynamical system step response. The Kolmogorov-Smirnov test (alpha = 5%) was used to verify normal distribution (steady-state error, p = 0.53; rise time, p = 0.88). The three sigma ellipse was calculated for the control group. ROC curves were used to measure the sensitivity and specificity of these parameters. Results: Rise time showed increased values in peripheral vestibular lesion patients with chronic dizziness. Two-dimensional analysis (rise time vs steady-state error) allows a better discrimination between patients with peripheral vestibular hypofunction with chronic dizziness and the rest of the studied population.
Authors:
Hamlet Su Rez; Dar O Geisinger; Enrique Ferreira; Alejo Su Rez; Cecilia San Rom N; Gonzalo Sotta
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-10
Journal Detail:
Title:  Acta oto-laryngologica     Volume:  -     ISSN:  1651-2251     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370354     Medline TA:  Acta Otolaryngol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Biomedical Engineering Program, Laboratory of Otoneurology, British Hospital, Montevideo and Departamento de Ingenier?a El?ctrica, Universidad Cat?lica del Uruguay , Montevideo, Uruguay.
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