Cited by 54Functional Brain Connectivity StudiesAdvanced Neuroimaging Techniques and ApplicationsAdvanced MRI Techniques and Applications

Detecting directional influence in fMRI connectivity analysis using PCA based Granger causality

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Zhou, Zhenyu, Ding, Mingzhou, Chen, Yonghong, Wright, Paul, Lu, Zuhong, Liu, Yijun·2009·Brain Research

Abstract

An fMRI connectivity analysis approach combining both principal component analysis (PCA) and Granger causality method (GCM) is proposed to study directional influence between functional brain regions. Both simulated data and human fMRI data obtained during behavioral tasks were used to validate this method. If PCA is first used to reduce number of fMRI time series, then more energy and information features in the signal can be preserved than using averaged values from brain regions of interest. Subsequently, GCM can be applied to principal components extracted in order to further investigate effective connectivity. The simulation demonstrated that by using GCM with PCA, between-region causalities were better represented than using GCM with average values. Furthermore, after localizing an emotion task-induced activation in the anterior cingulate cortex, inferior frontal sulcus and amygdala, the directional influences among these brain regions were resolved using our new approach. These results indicate that using PCA may improve upon application of existing GCMs in study of human brain effective connectivity.

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Crossref · 10.1016/j.brainres.2009.06.096

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  1. Ekman P Friesen WV 1976 Pictures of Facial Affect Consulting Psychologists Press
  2. Johansen-Berg H Behrens TEJ Matthews PM Katz E Metwalli N Lozano A 2006 Connectivity of a subgenual cingulate target for treatment-resistant depression Proceedings of 12th Human Brain Mapping Annual Meeting

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Authors
Zhou, Z., Ding, M., Chen, Y., Wright, P., Lu, Z., & Liu, Y.
Affiliations
  • Columbia University (US)
  • University of Florida (US)
  • Southeast University (CN)
Venue
Brain Research
Publisher
Elsevier BV
Published
2009-09
Volume
1289
Pages
22-29
ISSN
0006-8993 (ISSN-L)
OpenAlex
W2078515955
Cited by
54
References
33
Citations by year
2026: 2 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 1 · 2021: 3 · 2020: 1 · 2019: 2 · 2018: 6 · 2017: 2 · 2016: 3 · 2015: 3 · 2014: 6 · 2013: 5 · 2012: 6
FWCI
2.58
Type
journal article
Language
en
Open access
Locations
  • Brain Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Mental Health (MH072776, R03MH072776)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
Keywords
Granger causality, principal component analysis, effective connectivity, dimensionality reduction, anterior cingulate cortex, inferior frontal sulcus, amygdala, brain regions of interest
MeSH terms
Adolescent, Adult, Brain, Brain Mapping, Computer Simulation, Emotions, Female, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Middle Aged, Nerve Net, Neural Pathways, Psychomotor Performance, Imaging, Three-Dimensional, Principal Component Analysis

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