06/09/2026
Less screen time, please!!!
This image comes from an MRI study of preschoolers (Hutton et al., JAMA Pediatrics, 2020). It shows how screen use is linked to the wiring of the developing brain.
The top row (blue) highlights where more screen time is tied to weaker white matter organization. White matter is the brain’s wiring system that connects regions so they can work efficiently.
The bottom row (red) shows where heavier screen use is linked to weaker insulation on those connections. Insulation, or myelin, helps brain signals travel quickly, like the protective coating on an electrical wire.
Why does this matter? These highlighted areas include pathways for language, early literacy, and self-regulation. Children with higher screen scores also performed lower on language and literacy tests.
This is not a before and after of one child. It is a group-level finding. The message is clear. In the early years the brain is wiring for life. The more time children spend with people, play, movement, and books, the stronger these foundational circuits become.
