The idea that connections among neural elements are crucial for brain function has been central to modern neuroscience almost since its inception. Building on this idea, the emerging field of connectomics adds several new and important components. (Network Neuroscience)

In connectomics, a distinction is commonly drawn between three spatial scales: microscopic, mesoscopic, and macroscopic (Bohland et al., 2009). (Fundamentals of Brain Network Analysis)

The usefulness of connectomics is somewhat debated. Among popular arguments against it is that connectomics typically provides a static image. It can show which neurons have the possibility of interacting, but it does not show if they do, how much they do, and what the effect of that interaction is. (News Medical)