system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How did we figure out what different parts of our brain does?
gpt
A multitude of ways. Watching the brain react to tasks while being monitored. Tumors on the brain turning on and off certain functions. Errors during brain surgery. Lobotomies taught us a lot. There are a lot of contributors to the library of brain functions.