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On the role of otoliths and semicircular canals in spatial orientation: Dynamics of the visually perceived eye level during gondola centrifugation.
Swedish Defence Research Agency.
Swedish Defence Research Agency.
2005 (engelsk)Inngår i: Perception & Psychophysics
, ISSN 0031-5117, E-ISSN 1532-5962, Vol. 67, nr 7, s. 1242-1251
Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The visually perceived eye level (VPEL) was measured during gondola centrifugation. Subjects (N = 11) were seated upright, facing motion in a swing-out gondola The head was adjusted so that Reid's baseline was tilted 10 degrees anterior end up. The subjects were requested to adjust the position of a small luminous dot so that it was perceived as gravitationally at eye level. In the 1-g environment, the VPEL was a few degrees below the true gravitational eye level (M = -1.75 degrees, SD = 1.90 degrees). After rapid acceleration of the centrifuge to 2 G (vectorial sum of the earth gravity force and the centrifugal force), there was an exponentially increasing depression of the VPEL. The initial value was -6.4 degrees +/- 5.2 degrees. During 10 min at 2 G, the VPEL approached an asymptotic value of -24.8 degrees +/- 5.4 degrees. The time constant showed a large interindividual variability, ranging from 59 to 1,000 sec (M = 261 sec, median = 147 sec). The findings are discussed, taking into consideration otolith-semicircular-canal interaction, as well as memory functions of the vestibular system.

sted, utgiver, år, opplag, sider
2005. Vol. 67, nr 7, s. 1242-1251
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URN: urn:nbn:se:kth:diva-44591DOI: 10.3758/BF03193556ISI: 000235282300012PubMedID: 16502845OAI: oai:DiVA.org:kth-44591DiVA, id: diva2:451439
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QC 20111111Tilgjengelig fra: 2011-10-25 Laget: 2011-10-25 Sist oppdatert: 2018-01-12bibliografisk kontrollert

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