Check out this NPR article and radio show about the neuroscience behind reading.
A Lively Mind: Your Brain On Jane Austen
by Helen Thompson and Shankar Vedantam
Neuroscientists warned Phillips she wouldn’t see many brain differences between the casual reading and intense reading.
“Everyone told me to expect these really, really minute and subtle effects,” she said, “because everyone was going to be doing the same thing, right? Reading Jane Austen. And they were just going to be doing it in two different ways.” … Phillips said she mainly expected to see differences in parts of the brain that regulate attention because that was the main difference between casual and focused reading. … But in a neuroscientific plot twist, Phillips said preliminary results showed otherwise: “What’s been taking us by surprise in our early data analysis is how much the whole brain — global activations across a number of different regions — seems to be transforming and shifting between the pleasure and the close reading.”"
“Phillips found that close reading activated unexpected areas: parts of the brain that are involved in movement and touch. It was as though readers were physically placing themselves within the story as they analyzed it.”