Fuzz Rana has put up an interesting article “When Did Modern Human Brains—and the Image of God—Appear?” at https://reasons.org/explore/blogs/the-cells-design/read/the-cells-design/2018/11/14/when-did-modern-human-brains-and-the-image-of-god-appear
Skipping the first couple of completely irrelevant paragraphs which he usually includes for reason that escape me, He goes on to discuss a paper “The evolution of modern human brain shape” http://advances.sciencemag.org/content/4/1/eaao5961
So the RTB model would seem to include not only interbreeding with Neanderthals but also pre-modern homo sapiens? Are they linking Adam to the first “modern brain shape” homo spapien? It’s a bit over the head of a simple silicate chemist like myself, but the original paper notes that " It is intriguing that the evolutionary brain globularization in H. sapiens parallels the emergence of behavioral modernity documented by the archeological record"