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  Spatial resolution and imaging encoding fMRI settings for optimal cortical and subcortical motor somatotopy in the human brain

Marquis, R., Muller, S., Lorio, S., Rodriguez-Herreros, B., Melie-Garcia, L., Kherif, F., et al. (2019). Spatial resolution and imaging encoding fMRI settings for optimal cortical and subcortical motor somatotopy in the human brain. Frontiers in Neuroscience, 13: 571. doi:10.3389/fnins.2019.00571.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-0003-DD5B-F Versions-Permalink: https://hdl.handle.net/21.11116/0000-0004-638A-1
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 Urheber:
Marquis, Renaud 1, 2, Autor
Muller, Sandrine 3, 4, 5, Autor
Lorio, Sara 1, 5, Autor
Rodriguez-Herreros, Borja 1, 6, Autor
Melie-Garcia, Lester 1, Autor
Kherif, Ferath 1, Autor
Lutti, Antoine 1, Autor
Draganski, Bogdan1, 7, Autor           
Affiliations:
1Département des Neurosciences Cliniques, Laboratoire de Recherche en Neuroimagerie (LREN), Centre hospitalier universitaire vaudois, Lausanne, Switzerland, ou_persistent22              
2Department of Clinical Neurosciences, School of Medicine, University of Geneva, Switzerland, ou_persistent22              
3Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA, ou_persistent22              
4Stanley Center for Psychiatric Research, Broad Institute, Cambridge, MA, USA, ou_persistent22              
5UCL Great Ormond Street Institute of Child Health, University College London, United Kingdom, ou_persistent22              
6Sensory-Motor Laboratory (SeMoLa), Jules-Gonin Eye Hospital, University of Lausanne, Switzerland, ou_persistent22              
7Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              

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Schlagwörter: Functional magnetic resonance imaging; segregation; Image resolution; BOLD sensitivity; Subcortical areas
 Zusammenfassung: There is much controversy about the optimal trade-off between blood-oxygen-level-dependent (BOLD) sensitivity and spatial precision in experiments on brain’s topology properties using functional magnetic resonance imaging (fMRI). The sparse empirical evidence and regional specificity of these interactions pose a practical burden for the choice of imaging protocol parameters. Here, we test in a motor somatotopy experiment the impact of fMRI spatial resolution on differentiation between body part representations in cortex and subcortical structures. Motor somatotopy patterns were obtained in a block-design paradigm and visually cued movements of face, upper and lower limbs at 1.5, 2, and 3 mm spatial resolution. The degree of segregation of the body parts’ spatial representations was estimated using a pattern component model. In cortical areas, we observed the same level of segregation between somatotopy maps across all three resolutions. In subcortical areas the degree of effective similarity between spatial representations was significantly impacted by the image resolution. The 1.5 mm 3D EPI and 3 mm 2D EPI protocols led to higher segregation between motor representations compared to the 2 mm 3D EPI protocol. This finding could not be attributed to differential BOLD sensitivity or delineation of functional areas alone and suggests a crucial role of the image encoding scheme – i.e., 2D vs. 3D EPI. Our study contributes to the field by providing empirical evidence about the impact of acquisition protocols for the delineation of somatotopic areas in cortical and sub-cortical brain regions.

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Sprache(n): eng - English
 Datum: 2018-09-192019-05-202019-06-11
 Publikationsstatus: Online veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.3389/fnins.2019.00571
 Art des Abschluß: -

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Projektname : NCCR Synapsy
Grant ID : 32003B_159780
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Förderorganisation : Swiss National Science Foundation
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Förderorganisation : Leenaards Foundation
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Förderorganisation : Foundation Synapsis
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Förderorganisation : Roger De Spoelberch Foundation
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Förderorganisation : Partridge Foundations
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Grant ID : GN2214
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Förderorganisation : Henry Smith Charity and Action Medical Research
Projektname : Sinergia project
Grant ID : CRSII5_170873
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Förderorganisation : Swiss National Science Foundation
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Förderorganisation : National Institute for Health Research Biomedical Research Centre

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Titel: Frontiers in Neuroscience
  Andere : Front Neurosci
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Lausanne, Switzerland : Frontiers Research Foundation
Seiten: - Band / Heft: 13 Artikelnummer: 571 Start- / Endseite: - Identifikator: ISSN: 1662-4548
ISSN: 1662-453X
CoNE: https://pure.mpg.de/cone/journals/resource/1662-4548