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The subjective visual horizontal for different body tilts in the roll plane: characterization of normal subjects
Karolinska Hospital.
1996 (English)In: Brain Research Bulletin, ISSN 0361-9230, E-ISSN 1873-2747, Vol. 40, no 5-6, 375-383 p.Article in journal (Refereed) Published
Abstract [en]

In order to establish a method for estimation of the perceptual horizontal as a test of otolith function in diagnosis of atypical vertigo, in a first study we have standardized a test procedure and characterized a body of normal material consisting of 72 healthy subjects, 24 of them examined with tests followed by retests. The perceptual visual horizontal in darkness was estimated in the upright body position and at body tilts of 10, 20, and 30 degrees to the right and to the left by means of a narrow luminous bar. The deviation of the perceptual horizontal relative to the gravitational horizontal is expressed as a function of body tilt. In the upright body position, 95% had a perceptual horizontal within the range of +/- 2.5 degrees. In the tilted positions, there was a tendency to set the light bar tilted oppositely with respect to the body tilt. The results suggest that roll tilt to the right and to the left is sensed by two independent functional units. Furthermore, the results imply that some other factor might be of importance and that the perceptual horizontal in the upright position and tilt perception are complementary in reflecting vestibular function. Differences between individuals were great in comparison with intraindividual variability and the test-retest variability. The results are discussed against the background of the extensive literature.

Place, publisher, year, edition, pages
1996. Vol. 40, no 5-6, 375-383 p.
Keyword [en]
Vestibular tests, Otoliths, Perception, Spatial orientation
National Category
Physiology
Identifiers
URN: urn:nbn:se:kth:diva-45657DOI: 10.1016/0361-9230(96)00130-XISI: A1996VG78500031PubMedID: 8886362OAI: oai:DiVA.org:kth-45657DiVA: diva2:452915
Note
QC 20111102Available from: 2011-10-31 Created: 2011-10-31 Last updated: 2017-12-08Bibliographically approved

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