This is the area of your brain that does most of your complex thinking and decision making, among other things.
According to research done at the University of Washington, bilingual babies have more active brains than monolingual babies:
That’s one calm baby!
I’ve talked to many, many people over the years who say that students should not start learning English (or any second language) until they have “fully developed” their ability in Japanese (or any first language). What do you think about this opinion?