Abstract:
:Brain development during childhood and early adolescence is characterized by global changes in brain architecture. Neuroimaging studies have revealed overall decreases in cortical thickness (CT) and increases in fractional anisotropy (FA). Furthermore, previous studies have shown that certain cortical regions display coordinated growth during development. However, there is significant heterogeneity in the timing and speed of these developmental transformations, and it is still unclear whether white and grey matter changes are co-localized. In this multimodal neuroimaging study, we investigated the relationship between grey and white matter developmental changes and asynchronous maturation within brain regions in 249 normally developing children between the ages 7-14. We used structural magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) to analyze CT and FA, respectively, as well as their covariance across development. Consistent with previous studies, we observed overall cortical thinning with age, which was accompanied by increased FA. We then compared the coordinated development of grey and white matter as indexed by covariance measures. Covariance between grey matter regions and the microstructure of white matter tracts connecting those regions were highly similar, suggesting that coordinated changes in the cortex were mirrored by coordinated changes in their respective tracts. Examining within-brain divergent trajectories, we found significant structural decoupling (decreased covariance) between several brain regions and tracts in the 9- to 11-year-old group, particularly involving the forceps minor and the regions that it connects to. We argue that this decoupling could reflect a developmental pattern within the prefrontal region in 9- and 11-year-old children, possibly related to the significant changes in cognitive control observed at this age.
journal_name
Brain Imaging Behavjournal_title
Brain imaging and behaviorauthors
Moura LM,Crossley NA,Zugman A,Pan PM,Gadelha A,Del Aquilla MAG,Picon FA,Anés M,Amaro E Jr,de Jesus Mari J,Miguel EC,Rohde LA,Bressan RA,McGuire P,Sato JR,Jackowski APdoi
10.1007/s11682-016-9555-0subject
Has Abstractpub_date
2017-06-01 00:00:00pages
808-817issue
3eissn
1931-7557issn
1931-7565pii
10.1007/s11682-016-9555-0journal_volume
11pub_type
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