By age 4, one side of the brain is already calling the shots on language

MedicalXpress | 五月 18, 2026

The brain's capacity to use and understand language expands rapidly in the first years of life, as babies start to make sense of the words they hear and eventually begin to piece together sentences of their own. The language-processing parts of the brain that make this possible continue to evolve in older children, as they expand their vocabularies and learn to use language more flexibly.