Learning motor synergies by persons with Down syndrome.
Down syndrome motor clumsiness is not fixed—three days of varied finger practice sharpens force control.
01Research in Context
What this study did
The team asked adults with Down syndrome to press with several fingers at once. They had to keep the total force steady on a computer screen.
Each person practiced different finger combos for three days. Sensors tracked every finger so the computer could score how well the group worked as a team.
What they found
After only three days the adults produced smoother total force. Their fingers began sharing the load instead of fighting each other.
The improvement was large enough that the researchers called it a new synergy. Quick practice rewired the motor plan.
How this fits with other research
Wilkinson et al. (1998) saw persistent clumsiness in autism even without training. The new Down syndrome data seem opposite, but the studies looked at different diagnoses and one added practice while the other only tested.
Ferry et al. (2014) extend the idea. They gave kids with Down syndrome twelve months of weight-bearing games and found better bone density plus motor gains. Short finger drills and long gym classes both help the Down syndrome motor system.
DeRoma et al. (2004) used daily treadmill walks with girls who have Rett syndrome and also saw fast skill jumps. The pattern is similar: daily, simple motor work can unlock large changes across genetic disorders.
Why it matters
You can drop the myth that Down syndrome equals permanent clumsiness. Three short sessions of variable finger or hand games already tidy up motor noise. Add that to your warm-up, utensil training, or tablet drills and watch total force, grip, or handwriting stabilize long enough to build real-world skills.
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02At a glance
03Original abstract
Persons with Down syndrome are frequently described as 'clumsy'. The recent progress in the development of quantitative approaches to motor synergies has allowed researchers to move towards an understanding of 'clumsiness' at the level of underlying control mechanisms. This progress has also offered an opportunity to quantify changes in motor synergies that accompany improvement in the performance of motor tasks. Previous studies of our group have shown, in particular, that persons both with and without Down syndrome are able to show improvements in indices of their multi-finger synergies in tasks that require accurate production of finger forces. In particular, 3 days of practice has been shown to lead to significant improvements in indices of multi-finger synergies that stabilize the time patterns of the total force produced by the fingers of a hand. Persons with Down syndrome showed a qualitative change in their synergies that failed to stabilize the total force altogether prior to practice and became able to do so after practice. In addition, the studies have also shown that variable practice is more beneficial for the improvement of motor synergies than blocked practice. I would like to draw an optimistic conclusion that persons with Down syndrome are not inherently 'clumsy', but have a vast potential for an improvement of their motor performance. The current state of the area of motor control allows researchers and practitioners to tap into these reserves, and to use quantitative indices of changes in motor synergies with practice to optimize motor performance of these individuals.
Journal of intellectual disability research : JIDR, 2007 · doi:10.1111/j.1365-2788.2007.01008.x