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Effects on the vestibulo- and opto-oculomotor system in rats by lesions of the commissural vestibular fibres
Linköping University. Department of Otorhinolaryngology, Linköping University, Sweden.
Linköping University. Department of Otorhinolaryngology, Linköping University, Sweden.
Linköping University. Department of Otorhinolaryngology, Linköping University, Sweden.
Linköping University. Department of Otorhinolaryngology, Linköping University, Sweden.
1989 (English)In: Acta Oto-Laryngologica, ISSN 0001-6489, E-ISSN 1651-2251, Vol. 108, no 5-6, 372-377 p.Article in journal (Refereed) Published
Abstract [en]

Eye movements were recorded from rats with a magnetic search coil system before and after sectioning of the midline commissural pathways in the brain stem at the level of the vestibular nuclei. After lesion, the findings were as follows: 1) During sinusoidal vestibular stimulation the eyes moved in a sinusoidal way similar to the head movement without any regular saccades. There was a reduced gain and a phase lead. 2) During optokinetic stimulation the eyes moved in the stimulus direction to an excentric position and stayed there until stimulation ceased. 3) During acceleratory/deceleratory rotation in the light there was a drift of the eyes in the direction of the expected slow phase movement to an excentric position. In some animals there was a directional asymmetry. The findings may be explained by a failure of the central neural integrator for horizontal eye movements. The results support the hypothesis that vestibular commissural fibres are of crucial importance for the function of this integrator system.

Place, publisher, year, edition, pages
Informa Healthcare, 1989. Vol. 108, no 5-6, 372-377 p.
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-91787DOI: 10.3109/00016488909125542PubMedID: 2589068OAI: oai:DiVA.org:liu-91787DiVA: diva2:619059
Available from: 2013-05-01 Created: 2013-05-01 Last updated: 2017-12-06Bibliographically approved

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Tham, RichardLarsby, BirgittaÖdkvist, Lars

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