In a novel study, scientists who peeked into the brains of people caught up in a good book emerged with maps of what a healthy brain does as it reads. Most neuroscientists painstakingly have tracked how the brain processes a single word or sentence, looking for clues to language development or dyslexia by focusing on one aspect of reading at a time. [...] reading a story requires multiple systems working at once: recognizing how letters form a word, knowing the definitions and grammar, keeping up with the characters' relationships and the plot twists. The research team analyzed the scans, second by second, and created a computerized model of brain activity involved with different reading processes. "For the first time in history, we can do things like have you read a story and watch where in your brain the neural activity is happening," said senior author Tom Mitchell, director of Carnegie Mellon's Machine Learning Department.