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An exponential random graph modeling approach to creating group-based representative whole-brain connectivity networks.

Abstract：

:Group-based brain connectivity networks have great appeal for researchers interested in gaining further insight into complex brain function and how it changes across different mental states and disease conditions. Accurately constructing these networks presents a daunting challenge given the difficulties associated with accounting for inter-subject topological variability. Viable approaches to this task must engender networks that capture the constitutive topological properties of the group of subjects' networks that it is aiming to represent. The conventional approach has been to use a mean or median correlation network (Achard et al., 2006; Song et al., 2009; Zuo et al., 2011) to embody a group of networks. However, the degree to which their topological properties conform with those of the groups that they are purported to represent has yet to be explored. Here we investigate the performance of these mean and median correlation networks. We also propose an alternative approach based on an exponential random graph modeling framework and compare its performance to that of the aforementioned conventional approach. Simpson et al. (2011) illustrated the utility of exponential random graph models (ERGMs) for creating brain networks that capture the topological characteristics of a single subject's brain network. However, their advantageousness in the context of producing a brain network that "represents" a group of brain networks has yet to be examined. Here we show that our proposed ERGM approach outperforms the conventional mean and median correlation based approaches and provides an accurate and flexible method for constructing group-based representative brain networks.

journal_name

Neuroimage

journal_title

NeuroImage

authors

Simpson SL,Moussa MN,Laurienti PJ

doi

10.1016/j.neuroimage.2012.01.071

subject

Has Abstract

pub_date

2012-04-02 00:00:00

pages

1117-26

issue

2

eissn

1053-8119

issn

1095-9572

pii

S1053-8119(12)00088-2

journal_volume

60

pub_type

杂志文章

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