Document Detail


Tonotopic Gradients in Human Primary Auditory Cortex: Concurring Evidence From High-Resolution 7 T and 3 T fMRI.
MedLine Citation:
PMID:  25098273     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The tonotopic representations within the primary auditory cortex (PAC) have been successfully mapped with ultra-high field fMRI. Here, we compared the reliability of this tonotopic mapping paradigm at 7 T with 1.5 mm spatial resolution with maps acquired at 3 T with the same stimulation paradigm, but with spatial resolutions of 1.8 and 2.4 mm. For all subjects, the mirror-symmetric gradients within PAC were highly similar at 7 T and 3 T and across renderings at different spatial resolutions; albeit with lower percent signal changes at 3 T. In contrast, the frequency maps outside PAC tended to suffer from a reduced BOLD contrast-to-noise ratio at 3 T for a 1.8 mm voxel size, while robust at 2.4 mm and at 1.5 mm at 7 T. Overall, our results showed the robustness of the phase-encoding paradigm used here to map tonotopic representations across scanners.
Authors:
Sandra Da Costa; Melissa Saenz; Stephanie Clarke; Wietske van der Zwaag
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-8-7
Journal Detail:
Title:  Brain topography     Volume:  -     ISSN:  1573-6792     ISO Abbreviation:  Brain Topogr     Publication Date:  2014 Aug 
Date Detail:
Created Date:  2014-8-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8903034     Medline TA:  Brain Topogr     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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