Differences in hemispherical thalamo-cortical causality analysis during resting-state fMRI
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Version 1 2016-12-05, 15:39Version 1 2016-12-05, 15:39
conference contribution
posted on 2024-06-06, 11:50authored byAR Anwar, M Muthalib, S Perrey, S Wolff, G Deuschl, U Heute, M Muthuraman
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.
History
Pagination
990-993
Location
Chicago, Ill.
Start date
2014-08-26
End date
2014-08-30
ISSN
1094-687X
eISSN
1558-4615
ISBN-13
9781424479290
Language
eng
Publication classification
EN.1 Other conference paper
Title of proceedings
EMBS 2014 : Proceedings of the 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Event
IEEE Engineering in Medicine and Biology Society. Annual International Conference (36th : 2014 : Chicago, Ill.)