- It’s also a myth that we use only 10% of our brains.Even though there are still many things we don’t knowabout it, we do know that each part of the brain has apurpose.- Your brain only makes up about 2% of your bodyweight, but uses about 20% of your energy and oxygen.- The bursts of light a person sees after hitting their head (“seeing stars”) are the result of the brain hittingthe back of the skull. The back of your brain is where vision is processed.- It isn’t true that your brain stops making connectionsonce you become an adult. The ability to make newneural connections has been seen in adults who havehad brain injuries, who form connections around theinjured area.