Optokinetic nystagmus as an assessment of visual attention to divided stimuli

Williams, IM, Mulhall, L, Mattingley, J, Lueck, C and Abel, L (2006) Optokinetic nystagmus as an assessment of visual attention to divided stimuli. Journal of Clinical Neuroscience, 13 8: 828-833. doi:10.1016/j.jocn.2005.10.010


Author Williams, IM
Mulhall, L
Mattingley, J
Lueck, C
Abel, L
Title Optokinetic nystagmus as an assessment of visual attention to divided stimuli
Journal name Journal of Clinical Neuroscience   Check publisher's open access policy
ISSN 0967-5868
Publication date 2006-01-01
Sub-type Article (original research)
DOI 10.1016/j.jocn.2005.10.010
Volume 13
Issue 8
Start page 828
End page 833
Total pages 6
Place of publication Edinburgh
Publisher Churchill Livingstone
Language eng
Abstract Attentional resources are finite and decline with age. We measured subjects' abilities to generate optokinetic nystagmus (OKN), to suppress it with fixation and to continue to suppress it when fixating while simultaneously paying covert attention to a feature of the optokinetic (OK) stimulus. During fixation with a red laser spot, OKN was almost fully suppressed. When subjects suppressed the OKN while simultaneously paying covert attention to a feature of the OK stimulus, suppression of the OKN was less well suppressed. The active OKN was vigorous. Age affected only the divided attention task, perhaps reflecting a diminution in resources of attention with age. The neural pathways serving attention and those serving eye movements appear to be closely related. We suggest the test presented here represents an objective measurement of the ability to divide attention, and that it has the potential to be developed for much more widespread, possibly clinical, use. (c) 2006 Elsevier Ltd. All rights reserved.
Keyword Clinical Neurology
Neurosciences
Functional Mri
Search
Motion
Fmri
Age
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Queensland Brain Institute Publications
 
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Created: Thu, 18 Oct 2007, 01:19:31 EST