Human behaviors arise from the coordinated activity of neural elements which interconnect to form a complex brain network, known as the connectome. The connectome spans multiple spatial scales, from microscopic populations of neurons connected by synapses to macroscopic sets of brain regions connected by white-matter pathways. The goal of our lab is to understand the fundamental organizational principles and cognitive relevance of macroscale brain structural and functional networks in humans. We also examine the development of human brain network in adolescence and its abnormal development in mental disorders. To achieve these goals, our team combines neuroimaging techniques, network modeling, machine learning, behavioral and experimental design.