Learning to Learn Part 4: Motor Systems

This is the last post in our four-part Learning to Learn series, which begins with two students in the same classroom. In Part 3 we looked at the sensory systems that feed the brain information. This part is about what the brain does with that information: it moves the body. Body schema, bilateral integration, ocular motor control and motor planning all take shape at this stage, and each one turns up later at a school desk.

Key takeaways

• Motor development is built on sensory information: the brain must know where the body is before it can direct it.
• Body schema gives a child laterality and directionality, the internal sense of right, left, up and down that reading and letter formation depend on.
• Visual-motor integration is measurably related to legible handwriting (Daly et al., 2003) and to early achievement (Cameron et al., 2012).
• Voluntary eye-movement control is not finished at birth; it keeps maturing into adolescence (Luna et al., 2008).
• These are associations, not proof that motor work raises grades.

Body schema: the internal map

Motor development begins as an infant builds an internal awareness of the body and how its parts relate to one another. That map is called body schema, and it holds two ideas that matter later.

Laterality is knowing right from left on your own body. Crawling is often described as an early lesson in it, because the two sides of the body work together in opposition. We are not aware of research establishing crawling as the origin of laterality. Directionality projects that internal sense outward onto the world and the page.

Both underwrite reading and writing. Text runs left to right and top to bottom, and b, d, p and q differ only in direction. In our clinic, children whose sense of direction is still unsettled often reverse letters, confuse similar words and find visual discrimination hard. That is a clinical observation rather than a research finding. Two facts belong beside it. Reversals in the earliest grades are common, and on their own they are not a diagnosis. The 2009 joint statement from pediatric and ophthalmology bodies also holds that vision problems do not cause dyslexia (AAP/AAO/AAPOS/AACO, 2009). Persistent reversals alongside other findings deserve a closer look.

Bilateral integration: both sides as one team

Bilateral integration is the ability to coordinate both sides of the body at once. Children practise it by crawling, walking, climbing, running and other active play.

Movement in infancy does track with motor development. Across 16 studies and 4,237 infants, tummy time was linked to better gross motor and total development, and to moving more while prone, on the back, crawling and rolling (Hewitt et al., 2020). The same review found no link with fine motor skills or communication, and most of the studies were observational.

The World Health Organization sets out a floor for the first year (WHO, 2019). Under those guidelines, a baby under one should:

• Be physically active several times a day, especially through interactive floor-based play.
• Spend at least 30 minutes a day in tummy time.
• Not be restrained in a stroller or carrier for more than an hour at a time.
• Have no screen time at all.

At a desk the payoff is easy to see. Writing legibly takes one hand on the pencil and the other anchoring the paper, plus a settled hand preference. In our clinic, children who still find two-sided coordination effortful often struggle with spatial tasks on the page, write laboriously and produce little in the time given. That is what we observe, not a measured frequency.

Research does link visual-motor skill to written work. In 54 kindergarteners, Developmental Test of Visual-Motor Integration scores showed strong positive relationships with legible letter copying (Daly et al., 2003). In 213 children assessed before kindergarten, executive function and fine motor skill, specifically design copy, both predicted higher achievement at kindergarten entry and gains across the year (Cameron et al., 2012). Motor skill was one contributor among others, not the whole story. Pooling 11 studies, fine motor skills correlated positively with academic outcomes. The strongest subgroup correlation was between visual-motor integration and mathematics (r = 0.47) (Li et al., 2024). A review of preschool motor function found similar associations with speech and language, executive function and academics, with substantial variation between studies (McWhirter et al., 2024). All of this is correlational: it shows motor skill travelling with school work, not that motor training raises achievement.

Ocular motor control: aiming the eyes on purpose

Ocular motor control is the skill behind precise, deliberate eye movements. A newborn has very little of it. For the first two months a baby’s eyes often do not work together well, and may look crossed or wander outward. By three months they should be working together to focus on and follow an object (American Academy of Ophthalmology, 2026). Control keeps developing after that, and the voluntary, plan-driven part is still maturing through adolescence (Luna et al., 2008).

Reading depends on it. Skilled reading is a chain of quick jumps and brief pauses, with a large return sweep to each new line. The pattern of those movements reflects what the reader is processing moment to moment (Rayner, 1998). The direction of that relationship matters. Eye-movement patterns largely mirror language processing, so erratic movements in a struggling reader may well be a consequence of the reading difficulty rather than its cause. Children we see with poor ocular motor control describe losing their place, re-reading lines and taking words out of order. Their parents describe slow copying from the board and trouble lining up columns of numbers. We treat that as a description of what near work feels like for them, not as an explanation of why reading is hard.

Children who struggle to read do show tracking findings more often. In a comparison of 29 children with developmental dyslexia and 33 typical readers, ocular motor tracking deficits appeared in 62% versus 15% (Raghuram et al., 2018). The authors called the clinical relevance uncertain. A larger study of 5,822 children found that four of every five with severe reading impairment had entirely normal ophthalmic function (Creavin et al., 2015). It found no association with convergence or accommodation either. Its authors concluded there was no evidence that vision-based treatments would help this group.

Our clinical position here is a perspective, not a research finding. A tracking or eye-teaming problem is still worth finding and treating in the child who has one, because it makes near work uncomfortable. The research is equally clear that such problems do not explain most reading difficulty.

Motor planning: from effortful to automatic

Motor planning is the brain using sensory information to organize and direct the body, and any new skill demands heavy processing at first. Think of a child learning to walk. Head control, balance and a sense of where the legs are must be automatic before stepping is possible. Early on every step is deliberate and often misjudged; the brain sends a command, feels the result and adjusts until the movement becomes effortless.

A child who struggles with motor planning takes longer to learn new skills and writes with difficulty. Simple motor tasks take more time than the work itself would suggest.

Where depth perception fits

Two eyes working together produce stereopsis, which keeps sharpening through childhood from about 100 arcseconds at age 3 to 40 arcseconds by age 7 (Birch et al., 2008). It is not just a party trick. In 143 participants aged 10 to 30, pegboard and bead-threading performance was related to stereoacuity (O’Connor et al., 2010). Reduced stereopsis is the most common deficit in amblyopia, and it can affect motor coordination, sport and mobility (Levi et al., 2015). That is one reason a clumsy-looking child deserves a binocular vision workup. We go further into that in Vision Problems Masquerading as Poor Coordination or Clumsiness and on our motor and coordination page.

Back to our two students

Student A

This student’s body works in harmony. Posture holds itself, so little brainpower goes to motor tasks. Bilateral integration lets the right hand write while the left supports the notebook. Steady ocular motor control lets attention shift from board to page without losing the place.

Student B

This student spends conscious effort on the motor demands of the classroom. To avoid using both sides of the body at once, the arm is draped across the notebook instead of the hand supporting it. Place is lost during note-taking, and time spent hunting for it is time not spent listening. Handwriting suffers too.

What we can and cannot claim

Professional bodies disagree here, and families deserve both positions. The 2009 joint statement from the American Academy of Pediatrics, the American Academy of Ophthalmology and allied groups holds that dyslexia is language-based. Vision problems can interfere with learning, it says, but do not cause it. It also holds that the evidence does not support eye exercises or behavioral vision therapy for learning disabilities (AAP/AAO/AAPOS/AACO, 2009). The optometric position is that vision problems can and often do interfere with learning, and that optometric care belongs inside a multidisciplinary approach (AAO/AOA, 1997).

Our clinical perspective at Vision & Learning Center sits inside that second position, and we name it as a perspective, not a research finding. We measure specific visual skills, treat the treatable ones, and refer to occupational therapy and educational specialists for the work that is theirs. We do not promise that vision work will raise a reading score.

Two of everything

There are two sides of the brain, two sides of the body, two eyes and two ears. This stage is where a child learns to use all of them together without spending precious attention on the effort. Sensory input plus motor coordination makes the next stage possible: sensory processing and perceptual-motor skill, where visual information becomes meaning. The earliest pieces of that sequence appear in What Can My Baby See?, and it plays out on paper on our handwriting and math page.

The rest of the series

• Part 1: Two students, one lesson - the developmental sequence behind two children who earn the same score for very different effort.
• Part 2: Primitive reflexes - the five reflex patterns with the biggest classroom impact.
• Part 3: Sensory systems - the seven senses, including two most parents have never heard of.
• Part 4: Motor systems - you are here.

Starting earlier? See what a baby can see for the first months, and our developmental delays page for late milestones.

If your child’s handwriting, coordination or place-keeping looks more like Student B than Student A, a comprehensive developmental vision evaluation is a sensible next step. Learn more about our developmental vision evaluations or Schedule an evaluation at our Boynton Beach or Boca Raton office.