You keep talking of all this research, but don't give any specifics of who is doing the research or where it is published. Do you have any references?

And yes, it is well known that different parts of the brain are used in different tasks, but the whole of the brain is interconnected. Some areas are not strongly and directly linked to others, but they are certainly linked well enough for information from any one part of the brain to be synthesised with any other part.