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Journal Article

Flexible adaptive paradigms for fMRI using a novel software package 'Brain Analysis in Real-Time' (BART)

MPS-Authors
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Hellrung,  Lydia
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Faculty of Medicine, University of Leipzig, Germany;

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Hollmann,  Maurice
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

Zscheyge,  Oliver
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Schlumm,  Torsten
Methods and Development Unit Nuclear Magnetic Resonance, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Kalberlah,  Christian
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Faculty of Medicine, University of Leipzig, Germany;

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Roggenhofer,  Elisabeth
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Faculty of Medicine, University of Leipzig, Germany;
Integrated Research and Treatment Center Adiposity Diseases, University of Leipzig, Germany;
Clinic for Cognitive Neurology, University of Leipzig, Germany;

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Villringer,  Arno
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Faculty of Medicine, University of Leipzig, Germany;
Integrated Research and Treatment Center Adiposity Diseases, University of Leipzig, Germany;
Clinic for Cognitive Neurology, University of Leipzig, Germany;
Berlin School of Mind and Brain, Humboldt University Berlin, Germany;

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Horstmann,  Annette
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Faculty of Medicine, University of Leipzig, Germany;
Integrated Research and Treatment Center Adiposity Diseases, University of Leipzig, Germany;

Fulltext (public)

Hellrung_2014.PDF
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Citation

Hellrung, L., Hollmann, M., Zscheyge, O., Schlumm, T., Kalberlah, C., Roggenhofer, E., et al. (2015). Flexible adaptive paradigms for fMRI using a novel software package 'Brain Analysis in Real-Time' (BART). PLoS One, 10(4): e0118890. doi:10.1371/journal.pone.0118890.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-79FC-8
Abstract
In this work we present a new software package offering a unified framework for the real-time adaptation of fMRI stimulation procedures. The software provides a straightforward setup and highly flexible approach to adapt fMRI paradigms while the experiment is running. The general framework comprises the inclusion of parameters from subject’s compliance, such as directing gaze to visually presented stimuli and physiological fluctuations, like blood pressure or pulse. Additionally, this approach yields possibilities to investigate complex scientific questions, for example the influence of EEG rhythms or fMRI signals results themselves. To prove the concept of this approach, we used our software in a usability example for an fMRI experiment where the presentation of emotional pictures was dependent on the subject’s gaze position. This can have a significant impact on the results. So far, if this is taken into account during fMRI data analysis, it is commonly done by the post-hoc removal of erroneous trials. Here, we propose an a priori adaptation of the paradigm during the experiment’s runtime. Our fMRI findings clearly show the benefits of an adapted paradigm in terms of statistical power and higher effect sizes in emotion-related brain regions. This can be of special interest for all experiments with low statistical power due to a limited number of subjects, a limited amount of time, costs or available data to analyze, as is the case with real-time fMRI.