Precision fMRI reveals that the language network exhibits adult-like left-hemispheric lateralization by 4 years of age.
Ozernov-Palchik O; O'Brien AM; Lee EJ; Richardson H; Romeo R; Poliak M; Lipkin B; Small H; Capella J; Nieto-Castañón A; Saxe R; Gabrieli JDE; Fedorenko E
Some kids have brain damage on the left side but can still learn language using the right side of their brain. Scientists studied how kids' brains work for language and found that by age 4, the left side of the brain usually handles language, but it keeps growing stronger over time.