After performing ablation experiments on birds, and seeing that they could still fly, peck, mate, sleep, and perform a range of other regular behaviors, Flourens concluded that every area of the brain was capable of doing what every other area of the brain could, but only for higher-level functions which he called "perception". He also argued that elementary sensory input was localized, which is supported by current research. The famous saying that we only use 10% of our brains originates from Flourens, back about a century and a half ago.