Extendable supervised dictionary learning for exploring diverse and concurrent brain activities in task-based fMRI.
Recently, a growing body of studies have demonstrated the simultaneous existence of diverse brain activities, e.g., task-evoked dominant response activities, delayed response activities and intrinsic brain activities, under specific task conditions. However, current dominant task-based functional ma...
| Publicado en: | Brain Imaging & Behavior Vol. 12; no. 3; pp. 743 - 758 |
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| Autores principales: | , , , , , , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Jun2018
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=129999108&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 129999108 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 19317557 3GSC jtl: Brain Imaging & Behavior issn: 19317557 maglogo: N pubinfo: dt: Jun2018 vid: 12 iid: 3 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 129999108 129999108 NLM28600737 10.1007/s11682-017-9733-8 NLM28600737 129999108 ppf: 743 ppct: 15 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Extendable supervised dictionary learning for exploring diverse and concurrent brain activities in task-based fMRI. aug: au: Zhao, Shijie Han, Junwei Hu, Xintao Jiang, Xi Lv, Jinglei Zhang, Tuo Zhang, Shu Guo, Lei Liu, Tianming affil: School of Automation, Northwestern Polytechnical University, Xi’an, China sug: subj: Mental Processes Brain Mapping Methods Brain Brain Physiology Magnetic Resonance Imaging Methods Hemodynamics Neural Pathways Physiology Neural Pathways Clinical Assessment Tools Questionnaires ab: Recently, a growing body of studies have demonstrated the simultaneous existence of diverse brain activities, e.g., task-evoked dominant response activities, delayed response activities and intrinsic brain activities, under specific task conditions. However, current dominant task-based functional magnetic resonance imaging (tfMRI) analysis approach, i.e., the general linear model (GLM), might have difficulty in discovering those diverse and concurrent brain responses sufficiently. This subtraction-based model-driven approach focuses on the brain activities evoked directly from the task paradigm, thus likely overlooks other possible concurrent brain activities evoked during the information processing. To deal with this problem, in this paper, we propose a novel hybrid framework, called extendable supervised dictionary learning (E-SDL), to explore diverse and concurrent brain activities under task conditions. A critical difference between E-SDL framework and previous methods is that we systematically extend the basic task paradigm regressor into meaningful regressor groups to account for possible regressor variation during the information processing procedure in the brain. Applications of the proposed framework on five independent and publicly available tfMRI datasets from human connectome project (HCP) simultaneously revealed more meaningful group-wise consistent task-evoked networks and common intrinsic connectivity networks (ICNs). These results demonstrate the advantage of the proposed framework in identifying the diversity of concurrent brain activities in tfMRI datasets. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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