Check out this excerpt from Peter Watts' science fiction book, Starfish
: 'A lot of it happened while he was sleeping. Every night they'd give him an injection, to help him learn, Scanlon said. Afterwards a machine beside his bed would feed him dreams. He could never exactly remember them but something must have stuck, because every morning he'd sit at the console with his tutor — a real person, though, not a program — and all the text and diagrams she showed him would be strangely familiar. Like he'd known it all years ago, and had just forgotten. Now he remembered everything: plate tectonics and subduction zones, Archimedes Principle, the thermal conductivity of two percent hydrox. Aldosterone. Alloplasty. He remembered his left lung after they cut it out ...'