Well I would say it like this. The ancient part and the modern part of the brain are in a sort of dialogue. The ancient part can place a thought into the modern

Well I would say it like this. The ancient part and the modern part of the brain are in a sort of dialogue. The ancient part can place a thought into the modern part of the brain, like a sort of notification. The modern part can then decide to pay attention to this or decide not to. It can reason about it. And finally it can say something back to the ancient part of the brain. It can communicate some plan that the ancient part executes. I say ancient/modern rather than unconsious/conscious, because to a certain extent even the reasoning "just happens", so you might be tempted to say that even the reasoning is unconscious and it's actually all unconscious except some supernatural me that is just passively watching everything without actually taking any action. But we can bypass that (quite interesting) subject, by talking about ancient / modern, because the reasoning part is separate and more modern. Tldr: The neocortex is the homunculus (in the sense of https://en.wikipedia.org/wiki/Homunculus_argument https://en.wikipedia.org/wiki/Homunculus_argument).