Myelin 2 (IMAGE) University of Portsmouth Caption The image depicts myelin (Cyan), OPCs (Magenta) and cell nuclei in blue in the Corpus Callosum of the brain. The Corpus callosum is one of the biggest tracts of white matter and it connects the left and right hemisphere of the brain together. It is also one of the white matter tracts affected by aging. Credit Dr Andrea Rivera Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.