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. 2010 May 21:4:21.
doi: 10.3389/fnsys.2010.00021. eCollection 2010.

Typical and atypical development of functional human brain networks: insights from resting-state FMRI

Affiliations

Typical and atypical development of functional human brain networks: insights from resting-state FMRI

Lucina Q Uddin et al. Front Syst Neurosci. .

Abstract

Over the past several decades, structural MRI studies have provided remarkable insights into human brain development by revealing the trajectory of gray and white matter maturation from childhood to adolescence and adulthood. In parallel, functional MRI studies have demonstrated changes in brain activation patterns accompanying cognitive development. Despite these advances, studying the maturation of functional brain networks underlying brain development continues to present unique scientific and methodological challenges. Resting-state fMRI (rsfMRI) has emerged as a novel method for investigating the development of large-scale functional brain networks in infants and young children. We review existing rsfMRI developmental studies and discuss how this method has begun to make significant contributions to our understanding of maturing brain organization. In particular, rsfMRI has been used to complement studies in other modalities investigating the emergence of functional segregation and integration across short and long-range connections spanning the entire brain. We show that rsfMRI studies help to clarify and reveal important principles of functional brain development, including a shift from diffuse to focal activation patterns, and simultaneous pruning of local connectivity and strengthening of long-range connectivity with age. The insights gained from these studies also shed light on potentially disrupted functional networks underlying atypical cognitive development associated with neurodevelopmental disorders. We conclude by identifying critical gaps in the current literature, discussing methodological issues, and suggesting avenues for future research.

Keywords: attention-deficit/hyperactivity disorder; autism spectrum disorders; brain maturation; cognitive development; functional connectivity; resting-state fMRI.

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Figures

Figure 1
Figure 1
Graphical representation of developmental changes in functional connectivity along the posterior–anterior and ventral–dorsal axes, highlighting higher subcortical connectivity (subcortical nodes are shown in green) and lower paralimbic connectivity (paralimbic nodes are shown in gold) in children, compared to young-adults. Brain regions are plotted using the y and z coordinates of their centroids (in millimeter) in the MNI space. Four hundred and thirty pairs of anatomical regions showed significantly higher correlations in children and 321 pairs showed significantly higher correlations in young-adults (p < 0.005, FDR corrected). For illustration purposes, the plot shows differential connectivity that was most significant, 105 pairs higher in children (indicated in red) and 53 higher in young-adults (indicated in blue) (p < 0.0001, FDR corrected). Adapted from Supekar et al. (2009).

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