Brain Networks How Many Types Are There?

Unraveling the organizational structure of the brain has, in large measure, been reductionist in nature. While this has revealed, in ever-increasing detail, the fine structure of the brain, it does leave less directly addressed the beautifully integrated nature of brain function. Views of the functional organization of the brain should include a unitary perspective, despite the diversity of its constituent parts. This chapter focuses on recent observations from the authors' laboratory, which point to the value of an integrated approach as well as to answer the assigned title question: arguably, the brain consists of a single network with functional diversity.