👉 Paleoencephalon is a concept in evolutionary biology that refers to an organism's brain, or part of it, which has been kept relatively constant throughout its life span. This means that the structure and function of the brain have remained largely unchanged from generation to generation. In paleoencephalology, researchers study ancient human fossils to understand how these organisms' brains evolved over time, including changes in size, shape, and function. Paleoencephalic structures are thought to reflect