Structural damage in early preterm brain changes the electric resting state networks

Omidvarnia, Amir, Metsaranta, Marjo, Lano, Aulikki and Vanhatalo, Sampsa (2015) Structural damage in early preterm brain changes the electric resting state networks. NeuroImage, 120 266-273. doi:10.1016/j.neuroimage.2015.06.091

Author Omidvarnia, Amir
Metsaranta, Marjo
Lano, Aulikki
Vanhatalo, Sampsa
Title Structural damage in early preterm brain changes the electric resting state networks
Journal name NeuroImage   Check publisher's open access policy
ISSN 1095-9572
Publication date 2015-10-15
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.neuroimage.2015.06.091
Open Access Status Not yet assessed
Volume 120
Start page 266
End page 273
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2016
Language eng
Formatted abstract
A robust functional bimodality is found in the long-range spatial correlations of newborn cortical activity, and it likely provides the developmentally crucial functional coordination during the initial growth of brain networks. This study searched for possible acute effects on this large scale cortical coordination after acute structural brain lesion in early preterm infants.

EEG recordings were obtained from preterm infants without (n = 11) and with (n = 6) haemorrhagic brain lesion detected in their routine ultrasound exam. The spatial cortical correlations in band-specific amplitudes were examined within two amplitude regimes, high and low amplitude periods, respectively. Technical validation of our analytical approach showed that bimodality of this kind is a genuine physiological characteristic of each brain network. It was not observed in datasets created from uniform noise, neither is it found between randomly paired signals. Hence, the observed bimodality arises from specific interactions between cortical regions. We found that significant long-range amplitude correlations are found in most signal pairs in both groups at high amplitudes, but the correlations are generally weaker in newborns with brain lesions. The group difference is larger during high mode, however the difference did not have any statistically apparent topology. Graph theoretical analysis confirmed a significantly larger weight dispersion in the newborns with brain lesion. Comparison of graph measures to a child's performance at two years showed that lower clustering coefficient and weight dispersion were both correlated to better neurodevelopmental outcomes. Our findings suggest that the common preterm brain haemorrhage causes diffuse changes in the functional long-range cortical correlations. It has been recently recognized that the high mode network activity is crucial for early brain development. The present observations may hence offer a mechanistic link between early lesion and the later emergence of complex neurocognitive sequelae.
Keyword Neonatal EEG
Functional connectivity
Brain lesion
Resting state network
Intraventricular haemorrhage
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: UQ Centre for Clinical Research Publications
Official 2016 Collection
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Citation counts: TR Web of Science Citation Count  Cited 1 times in Thomson Reuters Web of Science Article | Citations
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