| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2024-01-25 |
| タイトル |
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|
タイトル |
Separating neuronal activity and systemic low-frequency oscillation related BOLD responses at nodes of the default mode network during resting-state fMRI with multiband excitation echo-planar imaging. |
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言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Atsushi Tachibana
Yoshiyuki Hirano
Jeff Kershaw
Takayuki Obata
Ikoma Yoko
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| 抄録 |
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内容記述タイプ |
Abstract |
|
内容記述 |
Functional magnetic resonance imaging (fMRI) evaluates brain activity using blood oxygenation level-dependent (BOLD) contrast. Resting-state fMRI (rsfMRI) examines spontaneous brain function using BOLD in the absence of a task, and the default mode network (DMN) has been identified from that. The DMN is a set of nodes within the brain that appear to be active and in communication when the subject is in an awake resting state. In addition to signal changes related to neural activity, it is thought that the BOLD signal may be affected by systemic low-frequency oscillations (SysLFOs) that are non-neuronal in source and likely propagate throughout the brain to arrive at different regions at different times. However, it may be difficult to distinguish between the response due to neuronal activity and the arrival of a SysLFO in specific regions. Conventional single-shot EPI (Conv) acquisition requires a longish repetition time, but faster image acquisition has recently become possible with multiband excitation EPI (MB). In this study, we evaluated the time-lag between nodes of the DMN using both Conv and MB protocols to determine whether it is possible to distinguish between neuronal activity and SysLFO related responses during rsfMRI. While the Conv protocol data suggested that SysLFOs substantially influence the apparent time-lag of neuronal activity, the MB protocol data implied that the effects of SysLFOs and neuronal activity on the BOLD response may be separated. Using a higher time-resolution acquisition for rsfMRI might help to distinguish neuronal activity induced changes to the BOLD response from those induced by non-neuronal sources. |
|
言語 |
en |
| 書誌情報 |
Frontiers in neuroscience
p. 961686,
発行日 2024-01
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| 出版者 |
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出版者 |
Frontiers Media S.A. |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1662-453X |
| PubMed番号 |
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識別子タイプ |
PMID |
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関連識別子 |
36213741 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.3389/fnins.2022.961686 |
