Summary: During visual learning tasks, children show a rapid increase in the inhibitory neurotransmitter GABA that persists after training ends. Adults, by contrast, show stable GABA levels. These differences suggest that children’s brains can stabilize new learning more quickly and efficiently than adults’ brains.
Source: Cell Press
If you’ve ever noticed that elementary school–aged children often pick up new skills and facts faster than adults, recent research published in Current Biology on November 15 provides strong evidence for that observation.
The study identifies a neurochemical mechanism that helps explain why children can learn certain visual tasks more efficiently: differences in levels of gamma-aminobutyric acid (GABA), a neurotransmitter that supports the stabilization of newly acquired information.
“Our results show that children of elementary school age can learn more items within a given period of time than adults, making learning more efficient in children,” said Takeo Watanabe of Brown University.
Using behavioral testing combined with advanced neuroimaging, the researchers measured GABA concentrations before, during, and after visual learning sessions in both children and adults. They found that visual training produced a pronounced and rapid rise in GABA within the children’s visual cortex, and that elevated level remained for several minutes after training stopped. Adults undergoing the same visual training did not show any measurable change in GABA levels over the same time course.
Previous studies had measured GABA in children at single time points, but this new work tracked its dynamics across learning, showing that the timing of GABA changes is closely linked to the learning episode itself. The observed transient GABA boost in children likely plays a role in rapidly stabilizing new visual memories, allowing children to consolidate and retain what they have just learned more quickly than adults.
Subsequent behavioral experiments in the study further supported the neurochemical findings: children consolidated new visual learning significantly faster than adults. “In subsequent behavioral experiments, we found that children indeed stabilized new learning much more rapidly than adults, which agrees with the common belief that children outperform adults in their learning abilities,” said Sebastian M. Frank, now at the University of Regensburg, Germany. “Our results therefore point to GABA as a key player in making learning efficient in children.”
These results suggest practical implications for education and parenting. Because children’s visual systems appear to react to training with a brief period of heightened inhibitory processing that supports rapid stabilization, giving children frequent, focused opportunities to practice new visual skills—such as reading exercises, handwriting, or visual problem solving—may capitalize on this neurochemical advantage and speed learning outcomes.
The findings also prompt a re-evaluation of how neuroscientists think about brain maturation. While some cognitive abilities and forms of inhibitory control develop later in life, this study shows that specific inhibitory processes mediated by GABA in sensory areas can be highly effective in children. “Our results imply that children exhibit highly efficient inhibitory, GABAergic processing in spite of inhibitory failures that have been observed in other domains such as cognitive control or attention,” Frank said. “This implies that GABAergic processing involved in different aspects of cognitive function might mature at different speeds.”
“Although children’s brains are not yet fully matured and many behavioral and cognitive functions may not be as efficient as in adults, children are not, in general, outperformed by adults,” Watanabe added. “On the contrary, children are, at least in some domains such as visual learning, superior in their abilities to adults.”
The researchers emphasize the need for further work to map how GABA responses vary across different brain regions and learning domains. Future studies could investigate whether similar GABA dynamics support rapid stabilization in other types of learning, including language-related skills like reading and writing, or motor skills such as cycling and sports.
Funding: This work was supported by the Fred M. Seed Foundation, the United States–Israel Binational Science Foundation, the National Institutes of Health (NIH), the Deutsche Forschungsgemeinschaft (DFG), and an Emmy Noether Grant.
About this learning research news
Author: Kristopher Benke
Source: Cell Press
Contact: Kristopher Benke – Cell Press
Image: The image is in the public domain
Original Research: The findings will appear in Current Biology