A new fMRI study of children aged 3 to 9 reveals that the brain regions responsible for language and for understanding others' feelings (theory of mind) are separate and non-overlapping, even in the youngest children. This suggests that our brains evolved with specialized wiring for these uniquely human abilities from the very beginning.
The Research
Led by Kelly Hiersche, a doctoral student in Zeynep Saygin's lab at Ohio State University, the study scanned 42 children (ages 3–9) and 28 adults using functional MRI. Children listened to sentences (to activate language regions) and watched a silent cartoon (to activate theory of mind regions). The researchers then analyzed brain activity at the 2–3 millimeter (voxel) level across both hemispheres.
Results, published April 23 in Communications Biology, showed that language processing localized to the left superior temporal lobe, while theory of mind localized to the right superior temporal lobe — with no overlap even in the youngest children. Additional resting-state scans revealed distinct connectivity patterns ("fingerprints") for each region, confirming they communicate with the rest of the brain in entirely different ways. Longitudinal data tracked children over time, showing this separation remains stable throughout childhood.
"It seems that these processors that help us mentalize and that help us speak and understand were dissociated very, very early in the evolutionary process," said Zeynep Saygin, senior author of the study.
Why It Matters for Your Brain
This finding challenges older theories that children's brains start as a "blank slate" and gradually specialize. Instead, the brain appears to have a built-in blueprint for these cognitive skills. For adults, the two systems actually begin to communicate more — suggesting we learn to integrate language and empathy as we mature. Understanding this architecture can inform education and therapy approaches, emphasizing that language and social cognition may benefit from separate training.
What You Can Do
To support both systems, engage in activities that challenge each independently. For language, try reading complex texts or learning new vocabulary. For empathy, practice perspective-taking exercises, such as imagining someone else's thoughts or feelings during conversations. Both skills can be strengthened through deliberate practice.
Source: Neuroscience News
Curious about your own brain? Take our free adaptive IQ test or try 306 brain training levels.
