by Lisa Vincenz-Donnelly, Human Brain Project Detail of a human brain section showing the architecture of fibers down to single axons in the hippocampus, revealed by 3D Polarized Light Imaging. Colors represent 3D fiber orientations highlighting pathways of individual fibers and tracts. Credit: Markus Axer and Katrin Amunts, INM-1, Forschungszentrum Jülich To understand how our...