There's a lot of confusion when you talk about "parts of the brain"

In my experience, acid helps you see the way the brain really works, as if you can watch all of your habits from the outside, and opens up your awareness to new ways of experiencing reality.

aka, 1) you see the way you experience yourself and the world,
2) you see that your way of experiencing could be different,
3) sometimes this leads you to experiment with other ways, temporarily or over the long term