Historically, the cortex was believed to be modular, with each part dedicated to a specific function.

“in the past it had been thought that uh you know the the cortex had uh were like uh countries on uh uh that Each of which each part of the cortex was dedicated to one function right uh you know there and and interestingly you record for the neurons and it certainly looks that way right in other words the there's a visual cortex in the back and there's a whole series of areas then there's the auditory cortex in the here in the middle and then the prefrontal cortex for social interaction and and so it looked really clearcut that it's modular”