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Article type: Research Article
Authors: Uimonen, Seijaa; * | Laitakari, Kyöstia | Kiukaanniemi, Heikkib | Sorri, Marttia
Affiliations: [a] Department of Otolaryngology, University of Oulu, Oulu, Finland | [b] Department of Pohja Military Hospital, University of Oulu, Oulu, Finland
Note: [*] Reprint address: Seija Uimonen, MD, Department of Otolaryngology, University of Oulu, Box 22, FIN-90221 Oulu, Finland.
Abstract: Voluntary, simulated vertigo and acute vertigo due to vestibular neuritis were examined by means of static posturography in 81 tests to evaluate the extent to which intentional malingering can be detected. Thirty healthy, normal subjects were first instructed to stand as still as possible on a static force platform and then to simulate dizziness. The true cases consisted of 21 patients with vestibular neuritis. The parameters analyzed included body sway velocity (BSV), body sway area of ellipse (BSE), and the Romberg quotient. Both the simulated and pathological posturographic BSV and BSE values differed from normal values under all test conditions, but they did not differ from each other, whereas the simulated values could be differentiated from the pathological ones with the Romberg quotient based on BSV. Five staff members of our audiological department were able to differentiate between the simulations and pathological cases quite well, with a median sensitivity of 0.77 and a specificity of 0.71 in a blinded test. A posturographic measurement, even performed once, can be useful to some extent for detecting simulation, but more investigation and development of the analysis system is required to obtain more specific results. For the present, the results obtained by trained observation of the subject in the test situation are at least as reliable as those obtained through the analysis of statistical measurements.
Keywords: posturography, vertigo, dizziness, malingering
DOI: 10.3233/VES-1995-5203
Journal: Journal of Vestibular Research, vol. 5, no. 2, pp. 117-124, 1995
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