Neuroscience

Biology

Cortex (anatomy)

Developmental psychology

Genetics

Psychology

Ontogeny

Developmental stage

Nature reviews. Neuroscience

The understanding of spoken language is mediated by bottom-up and top-down processing in the brain. In this Opinion article, Skeide and Friederici propose how changes in the structure and function of children's brains are associated with the development of language-processing skills. Language-processing functions follow heterogeneous developmental trajectories. The human embryo can already distinguish vowels in utero, but grammatical complexity is usually not fully mastered until at least 7 years of age. Examining the current literature, we propose that the ontogeny of the cortical language network can be roughly subdivided into two main developmental stages. In the first stage extending over the first 3 years of life, the infant rapidly acquires bottom-up processing capacities, which are primarily implemented bilaterally in the temporal cortices. In the second stage continuing into adolescence, top-down processes emerge gradually with the increasing functional selectivity and structural connectivity of the left inferior frontal cortex.

The ontogeny of the cortical language network