The neurobiology section is so far removed from the basic understanding of memory formation I honestly wonder how the author came up with it. It's not like myelin plays no role in learning, but the primary mechanism is synaptic formation. The author has ignored the stadium to focus on a seat. If you're interested in this I highly recommend "In Search of Memory" which is Eric Kandel's autobiography. He won the Nobel prize for his work describing how memories form and is a primary author of one of the most popular and widely used textbooks "Principles of Neural Science". His bio is highly entertaining, accessible, and informative.