A common memory misconception is that we only use a small percentage of our brain; like about 10%. This is untrue and is based on incorrect interpretations about the brain and memory. Movies like Limitless and Momento, while entertaining, sensationalize what happens in the brain and create stories to fill in the gaps (the brain is complicated). People have bought into the idea that we have some untapped potential that has gone to waste. There are no pills or potions that can unlock our ability to learn and remember. It takes paying attention and using memory strategies to have better memory. Find out more about how this belief may have spread in this video.
Chew, S.L. (2018, August 29). Myth: We Only Use 10% of Our Brains. Association for Psychological Science. https://www.psychologicalscience.org/teaching/myth-we-only-use-10-of-our-brains.html.
Lilienfeld, S. O., Lynn, S. J., Ruscio, J., & Beyerstein, B. L. (2009). 50 great myths of popular psychology. Wiley-Blackwell.