Picower Institute at MIT May 13 2025 People have a lot of misconceptions about what the brain's left and right hemispheres do, but one well-known aspect of this division may be even more true than people realize: The brain not only splits up visual spatial perception-processing what's on our left in the right hemisphere and what's on our right in the left hemisphere-it takes cognitive advantage of that. A new review by MIT neuroscientists explains what the field has learned about this division