fMRI measurements of amygdala activation are confounded by stimulus correlated signal fluctuation in nearby veins draining distant brain regions
Identifieur interne : 003949 ( Ncbi/Checkpoint ); précédent : 003948; suivant : 003950fMRI measurements of amygdala activation are confounded by stimulus correlated signal fluctuation in nearby veins draining distant brain regions
Auteurs : Roland N. Boubela [Autriche] ; Klaudius Kalcher [Autriche] ; Wolfgang Huf [Autriche] ; Eva-Maria Seidel [Autriche] ; Birgit Derntl [Allemagne] ; Lukas Pezawas [Autriche] ; Christian Našel [Autriche] ; Ewald Moser [Autriche, États-Unis]Source :
- Scientific Reports [ 2045-2322 ] ; 2015.
Abstract
Imaging the amygdala with functional MRI is confounded by multiple averse factors, notably signal dropouts due to magnetic inhomogeneity and low signal-to-noise ratio, making it difficult to obtain consistent activation patterns in this region. However, even when consistent signal changes are identified, they are likely to be due to nearby vessels, most notably the basal vein of rosenthal (BVR). Using an accelerated fMRI sequence with a high temporal resolution (TR = 333 ms) combined with susceptibility-weighted imaging, we show how signal changes in the amygdala region can be related to a venous origin. This finding is confirmed here in both a conventional fMRI dataset (TR = 2000 ms) as well as in information of meta-analyses, implying that “amygdala activations” reported in typical fMRI studies are likely confounded by signals originating in the BVR rather than in the amygdala itself, thus raising concerns about many conclusions on the functioning of the amygdala that rely on fMRI evidence alone.
Url:
DOI: 10.1038/srep10499
PubMed: 25994551
PubMed Central: 4440210
Affiliations:
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Tulln,<country>Austria</country></nlm:aff><country xml:lang="fr">Autriche</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Moser, Ewald" sort="Moser, Ewald" uniqKey="Moser E" first="Ewald" last="Moser">Ewald Moser</name><affiliation wicri:level="1"><nlm:aff id="a1"><institution>Center for Medical Physics and Biomedical Engineering, Medical University of Vienna</institution>, Vienna,<country>Austria</country></nlm:aff><country xml:lang="fr">Autriche</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="a2"><institution>MR Centre of Excellence, Medical University of Vienna</institution>, Vienna,<country>Austria</country></nlm:aff><country xml:lang="fr">Autriche</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="a7"><institution>Brain Behaviour Laboratory, Department of Psychiatry, University of Pennsylvania Medical Center</institution>, Philadelphia, PA,<country>USA</country></nlm:aff><country xml:lang="fr">États-Unis</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author></analytic><series><title level="j">Scientific Reports</title><idno type="eISSN">2045-2322</idno><imprint><date when="2015">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Imaging the amygdala with functional MRI is confounded by multiple averse factors, notably signal dropouts due to magnetic inhomogeneity and low signal-to-noise ratio, making it difficult to obtain consistent activation patterns in this region. However, even when consistent signal changes are identified, they are likely to be due to nearby vessels, most notably the basal vein of rosenthal (BVR). Using an accelerated fMRI sequence with a high temporal resolution (TR = 333 ms) combined with susceptibility-weighted imaging, we show how signal changes in the amygdala region can be related to a venous origin. This finding is confirmed here in both a conventional fMRI dataset (TR = 2000 ms) as well as in information of meta-analyses, implying that “amygdala activations” reported in typical fMRI studies are likely confounded by signals originating in the BVR rather than in the amygdala itself, thus raising concerns about many conclusions on the functioning of the amygdala that rely on fMRI evidence alone.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Catani, M" uniqKey="Catani M">M. Catani</name></author><author><name sortKey="Dell Cqua, F" uniqKey="Dell Cqua F">F. 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Ye</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Scharinger, C" uniqKey="Scharinger C">C. Scharinger</name></author></analytic></biblStruct></listBibl></div1></back></TEI><affiliations><list><country><li>Allemagne</li><li>Autriche</li><li>États-Unis</li></country></list><tree><country name="Autriche"><noRegion><name sortKey="Boubela, Roland N" sort="Boubela, Roland N" uniqKey="Boubela R" first="Roland N." last="Boubela">Roland N. Boubela</name></noRegion><name sortKey="Boubela, Roland N" sort="Boubela, Roland N" uniqKey="Boubela R" first="Roland N." last="Boubela">Roland N. Boubela</name><name sortKey="Huf, Wolfgang" sort="Huf, Wolfgang" uniqKey="Huf W" first="Wolfgang" last="Huf">Wolfgang Huf</name><name sortKey="Huf, Wolfgang" sort="Huf, Wolfgang" uniqKey="Huf W" first="Wolfgang" last="Huf">Wolfgang Huf</name><name sortKey="Kalcher, Klaudius" sort="Kalcher, Klaudius" uniqKey="Kalcher K" first="Klaudius" last="Kalcher">Klaudius Kalcher</name><name sortKey="Kalcher, Klaudius" sort="Kalcher, Klaudius" uniqKey="Kalcher K" first="Klaudius" last="Kalcher">Klaudius Kalcher</name><name sortKey="Moser, Ewald" sort="Moser, Ewald" uniqKey="Moser E" first="Ewald" last="Moser">Ewald Moser</name><name sortKey="Moser, Ewald" sort="Moser, Ewald" uniqKey="Moser E" first="Ewald" last="Moser">Ewald Moser</name><name sortKey="Nasel, Christian" sort="Nasel, Christian" uniqKey="Nasel C" first="Christian" last="Našel">Christian Našel</name><name sortKey="Pezawas, Lukas" sort="Pezawas, Lukas" uniqKey="Pezawas L" first="Lukas" last="Pezawas">Lukas Pezawas</name><name sortKey="Seidel, Eva Maria" sort="Seidel, Eva Maria" uniqKey="Seidel E" first="Eva-Maria" last="Seidel">Eva-Maria Seidel</name></country><country name="Allemagne"><noRegion><name sortKey="Derntl, Birgit" sort="Derntl, Birgit" uniqKey="Derntl B" first="Birgit" last="Derntl">Birgit Derntl</name></noRegion></country><country name="États-Unis"><noRegion><name sortKey="Moser, Ewald" sort="Moser, Ewald" uniqKey="Moser E" first="Ewald" last="Moser">Ewald Moser</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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