The area of the brain used for speech is an area on the left side of the brain
(I'm nor sure whether or not it's the parietal lobe or temporal lobe) is an area called "Broca's Area."
As for memory, which type are you talking about? (Again I'm asking for specific information.)
There is "Long Term Memory" and "Short Term Memory." It also depends upon the circumstances under which you are tryiung to memorize something. For example, if I'm cramming for an exam, I'll probably remember enough information to pass the exam. (That could follow under "Short Term Memory.)If, on the other hand, you read or learn about something which gives you a pleasurable experience from early childhood and you can vividly recall it, that's "Long Term Memory."
Another type of memory associated with learning is cognition. That also plays a role in what & how you learn. I need to learn more about this.