Sökning: WFRF:(Magnusson V)
> (1985-1989) >
Effect of alertness...
Effect of alertness and visual attention on optokinetic nystagmus in humans
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- Magnusson, M (författare)
- Lund University,Lunds universitet,Öron-, näs- och halssjukdomar, Lund,Sektion IV,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Otorhinolaryngology (Lund),Section IV,Department of Clinical Sciences, Lund,Faculty of Medicine
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- Pyykkö, I. (författare)
- Skåne University Hospital
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- Jäntti, V (författare)
- Tampere University Hospital
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(creator_code:org_t)
- 1985
- 1985
- Engelska 7 s.
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Ingår i: American Journal of Otolaryngology - Head and Neck Medicine and Surgery. - 0196-0709. ; 6:6, s. 25-419
- Relaterad länk:
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https://lup.lub.lu.s...
Abstract
Ämnesord
Stäng
- The effect of alertness and visual attention on optokinetic nystagmus (OKN) and optokinetic after-nystagmus (OKAN) was studied in 20 volunteers. Electroencephalographic (EEG) activity was recorded over the occipital lobe. Exposure to sound and vibration caused a significant increase in the mean slow-phase velocity of OKN, whereas its maximum slow-phase velocity remained unaffected. Vibration tended to increase the mean slow-phase velocity of OKN more than sound did, though the difference was not statistically significant. Vibration also significantly increased the OKAN. When alpha rhythm appeared in the occipital EEG during OKN, the velocity of concurrent slow phases was reduced. However, the periods of alpha rhythm did not differ between the different stimulus conditions. The findings suggest that sound and vibration activate the subcortical optokinetic mechanism, thus causing an increase in the mean velocity of OKN. Abatement of visual attention is reflected in temporary reduction of OKN in conjunction with the appearance of alpha waves and is to be interpreted as transient quiescence of the cortical optokinetic mechanism.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Oto-rhino-laryngologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Otorhinolaryngology (hsv//eng)
Nyckelord
- Acoustic Stimulation
- Adult
- Attention
- Blinking
- Brain
- Electroencephalography
- Electrooculography
- Female
- Humans
- Male
- Nystagmus, Physiologic
- Photic Stimulation
- Vibration
- Vision, Ocular
- Journal Article
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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