Source:http://linkedlifedata.com/resource/pubmed/id/10674463
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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
2
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pubmed:dateCreated |
2000-2-29
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pubmed:abstractText |
Using functional MRI and eye movement recordings we studied the processing of hierarchical stimuli. In agreement with others, we found a minor left hemispheric dominance during local and right dominance during global processing. When attention was directed locally, well-known oculomotor cortical areas were activated, and saccades were elicited in 41% of the trials. Their latencies were similar to pro-saccades. During global processing virtually no saccades occurred. These results suggest two different operational modes of attention. Attending to local features induces a shift of attention, which simultaneously computes a saccade on any level above the brainstem with a computational burden equal to reflexive saccades. Conversely, attending to global features induces an expansion of the focus of attention, which reinforces fixation.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:status |
MEDLINE
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pubmed:month |
Feb
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pubmed:issn |
0959-4965
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
7
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pubmed:volume |
11
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
241-7
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:10674463-Attention,
pubmed-meshheading:10674463-Fixation, Ocular,
pubmed-meshheading:10674463-Functional Laterality,
pubmed-meshheading:10674463-Humans,
pubmed-meshheading:10674463-Magnetic Resonance Imaging,
pubmed-meshheading:10674463-Male,
pubmed-meshheading:10674463-Models, Neurological,
pubmed-meshheading:10674463-Oculomotor Muscles,
pubmed-meshheading:10674463-Parietal Lobe,
pubmed-meshheading:10674463-Photic Stimulation,
pubmed-meshheading:10674463-Reaction Time,
pubmed-meshheading:10674463-Reference Values,
pubmed-meshheading:10674463-Regression Analysis,
pubmed-meshheading:10674463-Saccades,
pubmed-meshheading:10674463-Visual Cortex,
pubmed-meshheading:10674463-Visual Perception
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pubmed:year |
2000
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pubmed:articleTitle |
Hierarchical visual processing is dependent on the oculomotor system.
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pubmed:affiliation |
Department of Neurology, Universitätsspital, Zürich, Switzerland.
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pubmed:publicationType |
Journal Article,
Clinical Trial
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