Imaging brain networks - short presentation of new techniques

The brain is organized into large-scale functional networks with interactions between them. For the purpose of imaging brain networks, two fMRI techniques are particularly helpful. Diffusion tensor imaging (DTI) is based on the detection of water diffusion, which occurs preferentially in the longitudinal direction of axons, providing a mean to imagine the anatomy of axonal bundles. Functional connectivity is based on the relative synchrony of the blood-oxygen-level-dependent (BOLD) signal across brain regions that work together.