This research article from Nature Neuroscience investigates how the structural connections between the thalamus and the cerebral cortex develop in humans from childhood through early adulthood. By creating a new tractography atlas and analyzing brain imaging data from over 2,600 individuals, the researchers discovered that these connections mature according to a specific hierarchical axis that moves from sensorimotor areas to higher-order association regions. The study demonstrates that thalamocortical connectivity serves as a vital biological regulator for the timing of cortical plasticity, with association areas remaining flexible for longer periods. Furthermore, the findings suggest that the extended developmental window of these specific pathways makes them more sensitive to the socioeconomic environment. Ultimately, the work identifies the thalamus as a central coordinator in the spatiotemporal maturation of the human brain and its receptivity to external influences.

References:

• Sydnor V J, Bagautdinova J, Larsen B, et al. Human thalamocortical structural connectivity develops in line with a hierarchical axis of cortical plasticity[J]. Nature neuroscience, 2025, 28(8): 1772-1786.