Image 1 Axial MRIs (IMAGE) Radiological Society of North America Caption Axial MRIs show results of tract-based spatial statistics analysis of white matter fractional anisotropy clusters of voxels with a significant crossover interaction between concussion history and career duration (red and orange) and between concussion history and playing position (blue). Credit Radiological Society of North America Usage Restrictions May use with credit. 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.