I don't work in neuroscience, but I've taken a few courses in undergrad. I'll chime in until a professional can answer your question more definitively. There's

I don't work in neuroscience, but I've taken a few courses in undergrad. I'll chime in until a professional can answer your question more definitively. There's some evidence that the left and right brain hemispheres have their own desires and goals, based on some studies conducted by Roger Perry in the 1960's. Sperry received the 1981 Nobel Prize in Physiology or Medicine for his split-brain research. https://embryo.asu.edu/pages/roger-sperrys-split-brain-experiments-1959-1968 https://embryo.asu.edu/pages/roger-sperrys-split-brain-exper... Aside from the left-right split, I think there's a large category of well-supported models that conceive of the mind-brain as modular, but with sub-units dedicated to basic processing tasks (memory retrieval, sensory integration, etc.) rather than being fully-formed, discrete "personalities" in themselves.