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Gain and phase characteristics of compensatory eye movements in light and darkness: A study with a broad frequency-band rotatory test
Linköping University. Department of Oto-Rhino-Laryngology, Linköping University, Linköping, Sweden.
Linköping University. Department of Oto-Rhino-Laryngology, Linköping University, Linköping, Sweden.
Linköping University. Department of Oto-Rhino-Laryngology, Linköping University, Linköping, Sweden.
1984 (English)In: Acta Oto-Laryngologica, ISSN 0001-6489, E-ISSN 1651-2251, Vol. 97, no 3-4, 223-232 p.Article in journal (Refereed) Published
Abstract [en]

Thirteen normal subjects were investigated with a broad frequency-band (up to 4.5 Hz) rotatory test. The vestibular stimulation consisted of either a pseudo-random or a sinusoidal frequency sweep oscillation. Eye movements were recorded by EOG. Head movements were recorded either by a potentiometer attached to the chairs axis of rotation or by an angular rate sensor attached to a biteboard. Gain and phase values between eye and head movements were calculated. Measurements were performed in light and darkness during the execution of various fixation tasks. In the higher frequency range there was a difference in gain and phase between potentiometer and rate sensor measurements due to movement of the head relative to the headholder. Visual suppression, in agreement with earlier studies, was more effective during a sinusoidal stimulation than during a pseudorandom stimulation at low frequencies, using the more precise rate sensor measurement technique. Different instructions in the dark could alter the gain values at lower frequencies (up to 2 Hz) during sinusoidal stimulation. During pseudo-random stimulation no such differences could be elicited. Under all test conditions with the rate sensor, the gain values approached unity at about 3 Hz.

Place, publisher, year, edition, pages
Informa Healthcare, 1984. Vol. 97, no 3-4, 223-232 p.
National Category
Medical and Health Sciences
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URN: urn:nbn:se:liu:diva-91753PubMedID: 6609520OAI: oai:DiVA.org:liu-91753DiVA: diva2:619012
Available from: 2013-05-01 Created: 2013-05-01 Last updated: 2017-12-06Bibliographically approved

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Larsby, BirgittaHydén, DagÖdkvist, Lars

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