Protracted Neural Development of Dorsal Motor Systems During Handwriting and the Relation to Early Literacy Skills.
Level 4 - case-series / case-control
Cross-sectional developmental neuroimaging comparison (graded by design analogy)
PubMed 34867637 · doi:10.3389/fpsyg.2021.750559
What was done
Researchers used an MRI-compatible writing tablet to measure functional brain activation during handwriting in children aged 5 to 8 years and compared their neural responses to adults. They examined developmental differences in parietal and frontal motor systems and evaluated correlations between activation in these dorsal motor regions and a composite score of emerging literacy skills within the child cohort.
What was found
The abstract reports no quantitative values, sample sizes, or exact effect sizes. Qualitatively, parietal and frontal motor activation during handwriting differed between children and adults. Furthermore, activation in these dorsal motor regions among children correlated with individual differences on a composite literacy score.
Why it matters
These findings suggest that dorsal motor components supporting handwriting develop protractedly through early school age rather than maturing simultaneously with ventral-temporal visual regions. The association with literacy scores points toward a neural mechanism linking visual-motor development to early reading acquisition.
Limits
The abstract does not disclose participant counts for either children or adults, specific imaging contrast details, or numerical statistics. The cross-sectional comparison across age groups cannot establish a causal direction between neural motor maturation and reading development.
Cited by
- supports Data show that handwriting is important for the development of specific brain circuits.