When multiple regions are actually needed to work together to support a function as a network, then this shows up in the lesion and injury data also. There's also a lot of data from surgeries to address severe seizures.
There's some difficulties, such as if the brainstem is also involved in a function, then it's hard to tell because when the brainstem is damaged you're usually too dead to test the function. But I think if you started studying the brain without any prejudices about localization of function, you'd still end up finding a huge amount of it.
There's some difficulties, such as if the brainstem is also involved in a function, then it's hard to tell because when the brainstem is damaged you're usually too dead to test the function. But I think if you started studying the brain without any prejudices about localization of function, you'd still end up finding a huge amount of it.