Paper Info
Title
Differences in hemispherical thalamo-cortical causality analysis during resting-state fMRI.
Abstract
Thalamus is a very important part of the human brain. It has been reported to act as a relay for the messaging taking place between the cortical and sub-cortical regions of the brain. In the present study, we analyze the functional network between both hemispheres of the brain with the focus on thalamus. We used conditional Granger causality (CGC) and time-resolved partial directed coherence (tPDC) to investigate the functional connectivity. Results of CGC analysis revealed the asymmetry between connection strengths of the bilateral thalamus. Upon testing the functional connectivity of the default-mode network (DMN) at low-frequency fluctuations (LFF) and comparing coherence vectors using Spearman's rank correlation, we found that thalamus is a better source for the signals directed towards the contralateral regions of the brain, however, when thalamus acts as sink, it is a better sink for signals generated from ipsilateral regions of the brain.
Year
DOI
Venue
2014
10.1109/EMBC.2014.6943759
EMBC
Keywords
Field
DocType
tpdc,brain hemispheres,functional connectivity,brain ipsilateral regions,neurophysiology,time-resolved partial directed coherence,dmn,coherence vectors,bilateral thalamus,messaging relay,low-frequency fluctuations,connection strengths,lff,resting-state fmri,sub-cortical regions,spearman's rank correlation,default-mode network,biomedical mri,brain contralateral regions,brain,asymmetry,conditional granger causality,hemispherical thalamo-cortical causality analysis,cgc analysis,functional network,human brain,vectors,coherence,time series analysis,correlation,mathematical model
Rank correlation,Thalamus,Neuroscience,Causality,Resting state fMRI,Psychology,Coherence (physics),Human brain,Correlation
Conference
Volume
ISSN
Citations 
2014
1557-170X
0
PageRank 
References 
Authors
0.34
2
7
Name
Order
Citations
PageRank
Abdul Rauf Anwar101.01
Makii Muthalib2101.99
Stephane Perrey321.42
Stephan Wolff400.68
G Deuschl501.69
Ulrich Heute600.34
Muthuraman Muthuraman723.42