Dyslexia marked by poor reading fluency — slow and choppy reading — may be caused by disorganized, meandering tracts of nerve fibers in the brain, according to researchers at Children’s Hospital Boston, Beth Israel Deaconess Medical Center (BIDMC), and the Harvard Graduate School of Education (HGSE) at the time the work was done. Their study, using the latest imaging methods, gives researchers a glimpse of what may go wrong in the structure of some dyslexic readers’ brains that makes it difficult to integrate the information needed for rapid, “automatic” reading.