| Hemodynamic change in occipital lobe during visual search: visual attention allocation measured with NIRS. | |
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MedLine Citation:
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PMID: 19800898 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We examined the changes in regional cerebral blood volume (rCBV) around visual cortex using Near Infrared Spectroscopy (NIRS) when observers attended to visual scenes. The oxygenated and deoxygenated hemoglobin (Oxy-Hb and Deoxy-Hb) concentration changes at occipital lobe were monitored during a dual task. Observers were asked to name a digit superimposed on a scenery picture, while in parallel, they had to detect an on-and-off flickering object in a Change Blindness paradigm. Results showed the typical activation patterns in and around the visual cortex with increases in Oxy-Hb and decreases in Deoxy-Hb. The Oxy-Hb increase doubled when observers could not find the target, as opposed to trials in which they could. The results strongly suggest that active attention to a visual scene enhances Oxy-Hb change much stronger than passive watching, and that attention and Oxy-Hb increases are possibly correlated. |
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Authors:
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Haruyuki Kojima; Takeshi Suzuki |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Neuropsychologia Volume: 48 ISSN: 1873-3514 ISO Abbreviation: Neuropsychologia Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2009-12-16 Completed Date: 2010-02-26 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0020713 Medline TA: Neuropsychologia Country: England |
Other Details:
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Languages: eng Pagination: 349-52 Citation Subset: IM |
Affiliation:
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Department of Psychology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan. hkojima@kenroku.kanazawa-u.ac.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Attention
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physiology* Brain Mapping Cerebrovascular Circulation Hemodynamics / physiology* Hemoglobin, Sickle Hemoglobins / metabolism Humans Occipital Lobe / physiology* Oxyhemoglobins / metabolism Photic Stimulation / methods Reaction Time / physiology Spectroscopy, Near-Infrared* |
| Chemical | |
Reg. No./Substance:
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0/Hemoglobin, Sickle; 0/Hemoglobins; 0/Oxyhemoglobins; 37203-69-3/oxyhemoglobin S; 9008-02-0/deoxyhemoglobin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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