Brain recordings from newborns provide the first neural evidence that humans possess an inborn sense of numbers. This capacity likely offered a major evolutionary benefit. Within hours or days after birth, infants could differentiate between groups of four and twelve items, as shown by their brain activity patterns. Researchers note that extracting numerical information functions much like perceiving color for most people, forming part of the brain’s basic toolkit. A team at the University of Trento fitted twenty-one newborns aged zero to three days with EEG caps to track electrical activity. The infants heard sequences of syllables in sets of four or twelve while viewing matching or mismatched numbers of dots. Activity in the parietotemporal region decreased with matching quantities due to repetition suppression but increased with mismatches. This mechanism mirrors adult brain responses and confirms an innate numerical sense with clear survival advantages, such as distinguishing predator or food quantities. Early number sense at one year also predicts later math ability, potentially aiding identification of risks like dyscalculia.
