Hemodynamic change in occipital lobe during visual search: Visual attention allocation measured with NIRS
Hemodynamic change in occipital lobe during visual search: Visual attention allocation measured with NIRS
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DOI：
10.1016/j.neuropsychologia.2009.09.028
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发表时间：
2010-01-01
期刊：
影响因子：
2.6
通讯作者：
Suzuki, Takeshi
中科院分区：
文献类型：
--
作者：
Kojima, Haruyuki;Suzuki, Takeshi
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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. (C) 2009 Elsevier Ltd. All rights reserved.