Nobody performs lobotomies anymore — haven’t since the ‘70s. You’re thinking of corpus callostomies, which sever hemispherical connections in order to limit the spread of epileptic signals. While they prompt fascinating questions regarding neurological integration of the self, they don’t cause the cognitive, emotional, or behavioral changes lobotomies do.
That is one form. There are also therapies, occasionally in the frontal lobe, that use much smaller electrical devices to heat sections of brain to sever connections. Some also use lasers. It is all about cutting connections, a direct evolution from the dark days.
