Each white square is a polymer nano pen. When the pen tips make contact with a surface, the amount of light that they reflect increases, allowing for easy monitoring of the writing process.
This animation was generated from a normal human subject. It shows only the fibers that originate in a particular cross section of the brain. The blue arc in the middle of the brain is part of the cingulum bundle. Radiologists at Massachusetts General Hospital are beginning to use this method to examine their patients’ brain: it provides a quick way to scan through the entire set of data for abnormalities.
Massachusetts Institute of Technology