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  Properties of face localizer activations and their application in functional magnetic resonance imaging (fMRI) fingerprinting

Schwarz, L., Kreifelts, B., Wildgruber, D., Erb, M., Scheffler, K., & Ethofer, T. (2019). Properties of face localizer activations and their application in functional magnetic resonance imaging (fMRI) fingerprinting. PLoS One, 14(4), 1-21. doi:10.1371/journal.pone.0214997.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-7A0B-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-7A0C-8
Genre: Journal Article

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Schwarz, L, Author
Kreifelts, B, Author
Wildgruber, D, Author
Erb, M, Author              
Scheffler, K1, 2, Author              
Ethofer, T, Author
Affiliations:
1Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              
2Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              

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 Abstract: Functional localizers are particularly prevalent in functional magnetic resonance imaging (fMRI) studies concerning face processing. In this study, we extend the knowledge on face localizers regarding four important aspects: First, activation differences in occipital and fusiform face areas (OFA/FFA) and amygdala are characterized by increased activation while precuneus and medial prefrontal cortex show decreased deactivation to faces versus control stimuli. The face-selective posterior superior temporal sulcus is a hybrid area exhibiting increased activation within its inferior and decreased deactivation within its superior part. Second, the employed control stimuli can impact on whether a region is classified in group analyses as face-selective or not. We specifically investigated this for recently described cytoarchitectonic subregions of the fusiform cortex (FG-2/FG-4). Averaged activity across voxels in FG-4 was stronger for faces than objects, houses, or landscapes. In FG-2, averaged activity was only significantly stronger in comparison with landscapes, but small peaks within this area were detected for comparison versus objects and houses. Third, reproducibility of individual peak activations is excellent for right FFA and quite good for right OFA, whereas within all other areas it was too low to provide valid information on time-invariant individual peaks. Finally, the fine-grained spatial activation patterns in right OFA and FFA are both time-invariant within each individual and sufficiently different between individuals to enable identification of individual participants with near-perfect precision (fMRI fingerprinting).

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 Dates: 2019-04
 Publication Status: Published online
 Pages: -
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 Rev. Method: -
 Identifiers: eDoc: e0214997
DOI: 10.1371/journal.pone.0214997
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Title: PLoS One
Source Genre: Journal
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Publ. Info: San Francisco, CA : Public Library of Science
Pages: - Volume / Issue: 14 (4) Sequence Number: - Start / End Page: 1 - 21 Identifier: ISSN: 1932-6203
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000277850