You’re far from annoying me, nostr:npub162zpxufpw8pnuytaf0gfxzkqtvk9rvcwkvppa7x57y3n7qkfpg4shatdhy 😊

John, I think he’s implying when roughly most of the myelination process is complete. There’s some high quality sources linked here:

https://www.perplexity.ai/search/what-age-does-the-brain-comple-l7UqT072RRmI6SmfeneKKw#0