What did I learn about Brain Technology?

I learned that the brain helps the computer and the computer helps the brain, with the different parts of the brain meaning what side of the brain do what.

In the video, I saw how the prosthetic arm works using a monkey who was trying to get a marshmallow.  I think that work was pretty cool.

We also read an article about people who lost their arm or leg, so they go through tests and get a prosthetic limbs.