Building Brains Through Movement: Why Early Milestones Matter

When a baby first starts to roll, crawl, and reach, it may look like simple play. But every wiggle and scoot is actually building their brain. Movement and sensory experiences in the earliest years shape how the nervous system organizes itself—and how a child learns to move, feel, and connect with the world.

The first two years of life are when the brain grows faster than at any other time. During this stage, nerves are being coated with myelin, a protective layer that allows signals to travel more quickly and efficiently. This process moves from the bottom of the brain upward: survival functions mature first, while higher-level skills like language, problem-solving, and emotional regulation come later.

This “bottom-up” growth means that every early movement—rolling, crawling, creeping—helps strengthen the foundation for more advanced brain functions. Think of development as a ladder: each milestone is a rung. If too many rungs are missed, the ladder won’t be sturdy enough for the child to climb higher.

Babies come into the world with primitive reflexes, built-in movement patterns that help them survive and begin wiring their nervous system. These reflexes are meant to be temporary. Once a milestone is mastered—say, crawling—the associated reflex should be “integrated” so higher brain centers can take over.

But if reflexes don’t integrate properly, it can signal that the nervous system isn’t fully maturing. A child may favor one side, skip crawling, or show emotional and sensory challenges later on.

The Brain Ladder Analogy

Imagine your child’s brain like a ladder. The very top is the cerebral cortex, where the highest brain functions live—things like focus, problem-solving, emotional balance, and learning. But before a child can reach those top rungs, the lower rungs must be climbed one at a time. Each rung represents a developmental milestone supported by a specific level of the brain. If a rung is skipped or weak, the ladder becomes shaky, and the climb to higher learning is less stable.

Here’s how the ladder builds from the bottom up:

Medulla (first rung):

• Foundation for survival functions—breathing, heart rate, and swallowing.
• Linked to reflexes like rooting and sucking.
• If unstable, babies may struggle with feeding, reflux, weak cries, or poor sleep. Later, this can show up as digestion issues, low muscle tone, or difficulty calming.

Pons (second rung):

• Relay station for sensory information and movement.
• Army crawling helps strengthen this rung.
• If underdeveloped, kids may show emotional outbursts, sensory sensitivities, or poor balance and coordination.

Midbrain (third rung):

• Filters sensory input and supports posture, eye movements, and sound responses.
• Creeping on hands and knees builds this rung.
• If weak, children may appear easily overwhelmed, hyper-vigilant, or struggle with transitions in new environments.

Cortex (top rungs):

• Responsible for higher-level thinking, self-control, language, and learning.
• Around age two or three, synaptic pruning—the “use it or lose it” process—begins, shaping the brain based on early experiences.
• If the lower rungs are weak, challenges may appear here as attention issues (like ADHD), learning struggles, or emotional dysregulation.

Now imagine a baby climbing this ladder:

• He lifts his head and rolls.
• But he skips army crawling.
• He sits up, then when it’s time to creep, he scoots with one leg out instead of the proper cross-crawl pattern.
• He does this briefly, then goes straight to walking at 11 months.

By skipping army crawling and not creeping in the correct way, this child has essentially missed critical rungs on the developmental ladder. Later, when he’s in school, those missing rungs may show up as difficulty reading across a page, crossing midline, or even in sports where cross-body coordination is required.

Every milestone strengthens the ladder. If the ladder is unstable at the lower levels, higher brain functions can’t fully flourish.  Skipping them doesn’t just change movement in the moment—it can affect how strong the foundation is for all the brain functions that come later.  

The Role of Proprioception

One of the most important drivers of this process is proprioception—the body’s ability to sense where it is in space. It’s what allows you to touch your nose with your eyes closed or walk without looking at your feet.

For infants, proprioception comes from the spine, joints, and muscles sending constant signals to the brain. When those signals are clear, development flows smoothly. When they’re distorted, the brain gets confused, which can cause clumsiness, asymmetrical movement, or skipped milestones.

Subluxations: A Hidden Roadblock

A major disruptor of proprioception is a subluxation—a subtle misalignment or restriction in the spine or cranium that interferes with nerve signals. Subluxations can occur before birth (from tight womb positioning), during birth (especially with long labors, forceps, or cesarean), or after.

The upper neck (suboccipital area) is especially important because it has the highest concentration of proprioceptors in the body. If this area is stressed, it can distort how the brain processes movement and body awareness.

As noted in the Journal of Manual Medicine (Springer-Velar, 1992):

“Traumatization of the suboccipital structures inhibits functioning of the proprioceptive feedback loops. The motor development, though pre-programmed, cannot develop normally… These children may show only minor symptoms in the first months of life, but later on at the age of 5 or 6, they suffer from headaches, postural problems, or diffuse symptoms like sleep disorders, being unable to concentrate, etc.”

This is why chiropractors pay such close attention to babies’ spines. Subtle misalignments in infancy can ripple forward into later challenges if left unaddressed.

Why Chiropractic Care Matters

Chiropractic care is not about “treating reflexes.” It’s about clearing the interference that prevents the nervous system from developing as it should. Gentle, specific adjustments restore proper spinal and cranial motion, allowing the body to send clear signals to the brain. With this feedback restored, the brain can naturally integrate reflexes, strengthen posture, and build efficient movement patterns.

Sometimes, that alone is enough. Other times, parents may be encouraged to create opportunities for crawling, creeping, and play that reinforce brain-body connections. But without addressing the underlying subluxations, those exercises won’t have their full effect.

The Bigger Picture

When a baby misses or struggles with milestones, it’s not about being “behind.” It’s about a nervous system that may need help getting back on track. With proper support—movement, caregiver connection, and chiropractic adjustments—the brain and body can catch up and thrive.

In the end, chiropractic isn’t just about backs and necks. It’s about helping the nervous system function at its best, giving children the strongest foundation possible for learning, growing, and thriving throughout life.