翻訳と辞書 Words near each other ・ Blood, Sweat and Tears (album) ・ Blood, Sweat and Towers ・ Blood, Tears & Gold ・ Blood, Tears and Folly ・ Blood, toil, tears, and sweat ・ Blood, Women, Roses ・ Blood-borne disease ・ Blood-breasted flowerpecker ・ Blood-C ・ Blood-coloured woodpecker ・ Blood-eared parakeet ・ Blood-group-substance endo-1,4-beta-galactosidase ・ Blood-Horse magazine List of the Top 100 U.S. Racehorses of the 20th Century ・ Blood-Horse Publications ・ Blood-injection-injury type phobia ・ Blood-oxygen-level dependent ・ Blood-Red States ・ Blood-Rooted ・ Blood-spinning ・ Blood-vein ・ Blood-vomiting game ・ Blood/Candy ・ Bloodangel's Cry ・ Bloodaxe ・ Bloodaxe (comics) ・ Bloodaxe Books ・ Bloodbath ・ Bloodbath (disambiguation) ・ Bloodbath at the House of Death ・ Bloodbath Kavkaz Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Blood-oxygen-level dependent ： ウィキペディア英語版 Blood-oxygen-level dependent Blood-oxygen-level dependent contrast imaging, or BOLD-contrast imaging, is a method used in functional magnetic resonance imaging (fMRI) to observe different areas of the brain or other organs, which are found to be active at any given time. Its proof of concept was provided by Seiji Ogawa and colleagues in 1990, following an experiment which demonstrated that an ''in vivo'' change of blood oxygenation could be detected with MRI. Other notable pioneers of BOLD fMRI include Kenneth Kwong and colleagues, who first used the technique in human participants in 1992. == Theory == Neurons do not have internal reserves of energy in the form of sugar and oxygen, so their firing causes a need for more energy to be brought in quickly. Through a process called the hemodynamic response, blood releases oxygen to them at a greater rate than to inactive neurons. This causes a change of the relative levels of oxyhemoglobin and deoxyhemoglobin (oxygenated or deoxygenated blood) that can be detected on the basis of their differential magnetic susceptibility. In 1990, three papers published by Seiji Ogawa and colleagues showed that hemoglobin has different magnetic properties in its oxygenated and deoxygenated forms, both of which could be detected using MRI. This leads to magnetic signal variation which can be detected using an MRI scanner. Given many repetitions of a thought, action or experience, statistical methods can be used to determine the areas of the brain which reliably have more of this difference as a result, and therefore which areas of the brain are active during that thought, action or experience. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Blood-oxygen-level dependent」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.