書誌事項
- タイトル別名
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- An fMRI-MEG Integrative Method for Dynamic Imaging of Multiple Cortical Activities
- フクスウ ヒシツ カツドウ ノ ドウテキ イメージング ノ タメ ノ fMRI MEG トウゴウ カイセキホウ
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抄録
We have developed an fMRI-MEG integrative method that is capable of analyzing spatiotemporal multiple cortical activities. Firstly, activated regions were determined by statistically analyzing fMRI data. Secondly, using fMRI analysis results as a spatial constraint, the location and orientation of equivalent current dipoles (ECD) were estimated by a procedure that maximizes the inner product of lead field and measured field vectors. The time-varying dipole moment was obtained by projecting the optimized lead field vector to measured fields. We applied the technique to data obtained during a visual perception task. An apparent motion stimulus that activates both primary and secondary visual areas (V1/2) and V5 was used in the experiment. Event-related neuromagnetic fields were measured by a 306-channel MEG system, whereas the fMRI data were acquired by a 1.5 T MR system. The present fMRI-MEG integrative analysis method successfully detected dynamic cortical activities in V1/2 and V5.
収録刊行物
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- 生体医工学
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生体医工学 43 (4), 777-784, 2005
公益社団法人 日本生体医工学会
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詳細情報 詳細情報について
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- CRID
- 1390282680244654976
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- NII論文ID
- 130004493975
- 110004704995
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- NII書誌ID
- AA11633569
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- ISSN
- 18814379
- 1347443X
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- NDL書誌ID
- 7886685
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可