Infant Reflexes: How They Build Your Baby’s Brain
When feeding feels harder than you expected, it’s confusing. We’re told over and over that “breastfeeding is natural,” so when it doesn’t just click into place, trying to figure out what’s going on can feel overwhelming.
You’ve tried the positions, adjusted your hold, and maybe even heard a few things about rooting or sucking reflexes. But there’s a bigger picture that often gets left out of the conversation.
Your baby’s reflexes do more than help them open their mouth. They’re part of a developing system that connects movement, sensation, and feeding. Understanding that system can help you make sense of what you’re seeing—and find ways to make feeding easier.
If that’s where you’re getting stuck, why latching can feel harder than you expected explores how this shows up during feeds.
What Reflexes Actually Are
Reflexes are automatic responses to particular cues. Your newborn doesn’t have to decide to turn toward a touch on their cheek or begin sucking when something touches the roof of their mouth. Their nervous system already has responses that help them get started.
These responses are part of how babies come into the world ready to interact with us. You might notice your baby root toward your breast, grasp your finger, or startle with a sudden change in position.
That doesn’t mean every movement is a reflex, or that babies respond exactly the same way every time. Their age, alertness, comfort, and health all affect what you see.
And while rooting isn’t a deliberate request for food, it can still be a useful feeding cue. An automatic response can tell you something about what your baby may need.
Some reflexes remain throughout life. Many newborn reflexes become less apparent or disappear as the nervous system matures and movement becomes more voluntary. That changing pattern is one reason your baby’s healthcare provider checks reflexes during developmental examinations.
How Reflexes Help Your Baby’s Brain Develop
Even before you felt your baby move for the first time, their nervous system and body were already developing together.
Movement creates sensation. When your baby turns their head, bends a leg, or brings a hand toward their mouth, information travels back through their nervous system about what moved and what happened next.
Reflexes are part of those early experiences. So are the spontaneous movements babies make without an obvious outside cue. Together with growth, sensory experiences, and interaction, those movements contribute to how your baby learns to use their body.
One way I like to picture this is the development of a highway system.
In the beginning, a new movement can look like a little trail through the woods. It’s there, but it isn’t necessarily smooth or easy to navigate. With development and experience, some routes become easier to use—more like well-traveled roads.
The highway picture is a way to understand the process, rather than a literal map of what each reflex builds. But it helps explain why those little movements matter. Your baby isn’t just moving. They’re also experiencing what movement feels like.
Over time, the movements that once looked wobbly or unpredictable become more coordinated and purposeful.
Reflexes Help Connect the Brain and Body
Feeding is a good example of why those connections matter.
Your baby doesn’t use their mouth in isolation. They need support through their body, freedom to move their head, and the ability to coordinate sucking, swallowing, and breathing.
When their cheek touches you and they turn toward that contact, movement and sensation are working together. When they bring a hand toward their mouth, they’re getting information through both touch and movement.
These experiences overlap. Your baby feels your body, hears your voice, moves against you, and responds to what happens next.
This is the connection I want parents to see: feeding involves a whole baby, not just a mouth. Looking at how their body is supported can help us understand why something that looks like a latch problem may need more than a different instruction about where to put the nipple.
Reflexes in Action: The Birth Crawl
If you’ve seen a newborn move toward the breast during a “birth crawl,” you’ve seen some of these early behaviors in action.
With close supervision and support during skin-to-skin contact, some newborns bob their heads, turn, push with their legs, and gradually move toward the breast. Touch, smell, movement, and reflexive responses all contribute to the process.
Nobody has taught them a set of latching instructions. Their body already brings something to the experience.
But not every baby does this after birth. Alertness, birth experiences, medications, and medical needs can affect that first opportunity. Missing a birth crawl doesn’t mean you’ve missed your chance to breastfeed.
Later skin-to-skin time can still offer closeness and opportunities to explore feeding. Stay awake, keep your baby’s face visible and airway clear, and support them throughout. Your baby doesn’t need to complete a crawl or latch independently for that time to be worthwhile.
The useful takeaway isn’t that babies should manage feeding alone. It’s that they have responses we can learn to support.
When Movement Feels Harder
Sometimes a baby has an easier time moving one way than another. They may consistently turn their head to one side, seem uncomfortable in a particular position, or have trouble settling into a feed.
When one movement is difficult, they may find another way to get the job done. In practice, we often describe that as a compensation.
Think about how you move when your ankle hurts. You can still walk, but you may shift your weight or change your stride. Babies can also adapt around discomfort or limited movement.
That doesn’t mean an uneven movement tells us exactly what’s happening in their brain, or that a difficult feed proves a reflex isn’t working. It gives us something worth noticing and assessing.
A persistent head preference, restricted neck movement, or developing flat spot deserves a conversation with your baby’s healthcare provider. A pediatric physical therapist may help identify what’s limiting movement and offer support that fits your baby.
You don’t need to diagnose the cause yourself. Noticing a pattern is enough to ask for help.
How This Impacts Feeding and Latching
This is where understanding reflexes can change how we approach feeding.
We’re often taught where to place our hands, how to shape the breast, and when to bring the baby in. Those techniques can be useful. But if we focus only on completing the steps, it’s easy to miss how the baby is responding.
Are they comfortable and supported? Can they move their head? Are they turning toward contact, opening their mouth, and moving into the breast—or pulling away and becoming frustrated?
In my practice, those responses help guide what I change next. Sometimes supporting the shoulders differently or giving the baby more room to tip their head back makes feeding easier. Other times, there’s more to assess.
Opening wide is one part of that picture. A position that allows your baby to tip their head back and approach the breast chin first can help them take a fuller mouthful. If this is the part that keeps feeling difficult, this guide to helping your baby open wide before latching goes into more detail.
And if your baby gets attached but keeps slipping or feeding hurts, understanding a deep versus shallow latch can help you look beyond how the latch appears.
Positioning matters because of what it makes possible for your baby. The goal is a comfortable, effective feed—not getting both of you into one supposedly perfect position.
What Can Get in the Way
Babies need opportunities to move, and some parts of everyday life naturally limit those opportunities.
Long stretches in seats or swings, or being swaddled throughout awake time, leave less room for stretching, turning, and exploring. Pain, illness, restricted neck movement, or difficulties coordinating feeding can also make movement harder.
That doesn’t mean you’ve caused a problem by using a car seat or helping your baby settle. Car seats have an important job during travel. Swaddling may be part of your sleep routine until your baby shows signs of trying to roll.
The practical goal is to offer variety during awake time: holding your baby close, letting their hands move, and giving them supervised time on a firm, flat surface where they can stretch and explore.
You don’t need to spend the day trying to trigger reflexes. You’re giving your baby comfortable opportunities to use their body.
For everyday ideas, Supporting Your Baby’s Reflexive Development walks through simple ways to do that without adding another complicated routine.
Moving Forward with Confidence
The most important thing to remember is that supporting development doesn’t require perfection. Your baby is learning through the ordinary moments you share: being held, feeding, looking around, stretching, and moving.
If feeding has felt harder than you expected, that isn’t evidence that you’ve done something wrong. You’re learning how your baby’s brain and body work—and understanding reflexes gives you another useful way to look at what’s happening.
You don’t have to figure it all out alone. When feeding stays painful or difficult, an IBCLC can help assess a feed and work with your baby’s healthcare team when more support is needed.
You can give your baby chances to move, notice what feels difficult, and ask for help along the way. That’s how you keep moving forward, together.
Sources — click to open
This article brings together published research, developmental guidance, and my clinical perspective. The highway comparison is an explanatory metaphor. These resources support the discussion of early movement, newborn reflexes, and feeding; they do not establish every connection discussed here.
Want More Support?
If this blog was helpful, here are a few related resources you might like.
➜ How to Support Your Baby’s Reflexive Development
➜ Why Latching Feels Hard: Understanding Your Baby’s Reflexes
🔒 Go Deeper: Baby Won't Open Wide? Get the Gaping Reflex Back On Track
🔒 Expanded Access includes step-by-step videos and resources that go beyond the blog to help you understand and work through common feeding challenges.
