| 1. |
- Schalén, L, et al.
(författare)
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Intra-individual variation in oculomotor performance in man
- 1984
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Ingår i: Acta Oto-Laryngologica, Supplement. - : Informa UK Limited. - 0365-5237 .- 0001-6489 .- 1651-2251. ; 96:S406, s. 7-212
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Tidskriftsartikel (refereegranskat)abstract
- Peak velocity of saccade, maximum velocity of smooth pursuit, and peak velocity of slow phase of vestibular and optovestibular nystagmus were measured three times daily on three separate days in 6 healthy subjects in order to estimate the intra-individual variation of the results of oculomotor tests. Analysis of variance revealed that the oculomotor performance of the individual subjects varied systematically, depending on whether the tests were performed in the morning, at noon, or late in the afternoon. In particular, the velocity of saccade displayed lowest values in the afternoon. The present results indicate that oculomotor performance may depend on the individual biological rhythm of fatigue; however, it is also possible that eye motor behaviour is coupled to an independent rhythm of motor activity. Circadian rhythmicity of oculomotor performance should be considered in follow-up studies and in examination of patients with reduced vigilance.
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| 2. |
- Wennmo, Carsten, et al.
(författare)
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Visually evoked slow eye movements, visual-vestibular interaction, and infratentorial lesions
- 1983
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Ingår i: Otolaryngology - Head and Neck Surgery. - : Wiley. - 0194-5998 .- 1097-6817. ; 91:1, s. 76-80
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Tidskriftsartikel (refereegranskat)abstract
- The maximum velocity gain of smooth pursuit and optokinetic, vestibular, and optovestibular slow phases was examined in 15 patients with pontine, 10 with medullary, 10 with cerebellar, and 5 with combined cerebello-brain stem disorders. Marked dissociations were observed between smooth pursuit and optokinetic slow phases, especially in medullary disease. A cerebellar deficit enhanced slow phase velocity gain during rotation in darkness, whereas the corresponding gain during rotation in light was normal.
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