Finally, we wish to underscore the utility of graph theoretic approaches to describing brain networks. Graph theory is a rigorous, established, and appropriate framework within which to examine MRI networks. The tools it offers are powerful and flexible, and neuroscientists have only begun to tap the substantial resources available for studying brain networks (http://sites.google.com/a/brain-connectivity-toolbox.net/bct/Home). Graph theoretic approaches sidestep many limitations of more traditional analysis techniques, and enable more complete studies of brain networks than have been previously feasible. The utility of examining more comprehensive brain networks is hopefully evident from the work we have reviewed. Though much progress has been made in recent years, it is clear that the task of understanding the development of the structure and properties of functional brain networks is only beginning.
