The quote in post 58 above: "The tripartite brain is still a sound model in neurobiology".
I found this interesting article for people who want to dive into the details:
And for further commentary:
Ths interesting comment from the psychology.stackexchange:
There isn’t a new model, exactly, since as the poster stated, the brain doesn’t operate as a model and earlier versions of brain structures simply modify themselves to evolve— it’s one brain. Meaning, one’s “lizard brain” is actually just a mammalian brain now. The new model perhaps is The Human Brain? But given that the Triune model was most popularized by lawyers needing it for defense against emotional (irrational) behavior and psychologists adopted it for explanation of emotional dysregulation, then likely the best replacement is theory about emotion. Emotions are not well understood, and there are several theories about them, but the latest and most provocative development is the Theory of Constructed Emotion. See Barrett-Feldman et al.