Brain First. Gut Second: The Nervous System Side of Your Child’s Digestive Health
Constipation, stomach aches, reflux, and irregular digestion are not just about the gut. 🧠 The brain, vagus nerve, and autonomic nervous system play a major role in regulating digestive function. In this video, Dr. Drake breaks down why we say Brain First. Gut Second. and how INSiGHT Scans help us look deeper at nervous system stress and regulation.
If your child struggles with constipation, stomach aches, reflux, or other ongoing gut issues, chances are you have already spent a lot of time focusing on their digestive system.
You have changed their diet, added probiotics, increased fiber and water, removed certain foods, or tried different supplements.
But what if your child’s gut is not the only place you should be looking?
Because digestion does not start and stop in the digestive tract.
It is heavily regulated by the brain and autonomic nervous system.
And one of the biggest communication pathways connecting the brain and digestive system is the vagus nerve.
So today, I want to explain why we say:
Brain first. Gut second.
And why understanding your child’s nervous system is an important missing piece.
THE BRAIN-GUT CONNECTION is a bidirectional communication network between the central nervous system and digestive system.
There are neurological signals, hormones, immune signals, the microbiome, and several other mechanisms involved in that communication.
But one of the major neurological highways is the vagus nerve.
The vagus nerve is part of your autonomic nervous system, specifically the parasympathetic side—the side associated with things like rest, recovery, regulation, and digestion.
And here is something really interesting:
Approximately 80% of the fibers within the vagus nerve are afferent, meaning they are carrying sensory information from the body back toward the brain.
So this really is an ongoing conversation.
The brain helps regulate digestive motility, appetite, blood flow, and other digestive processes.
At the same time, the digestive system is constantly sending information back toward the brain about what is happening inside the body.
For healthy digestion, that communication needs to be organized and adaptable.
THINK ABOUT WHAT HAPPENS WHEN YOUR CHILD IS STRESSED
Most parents have already seen this connection without realizing there is neurological science behind it.
Maybe your child gets nervous before school and suddenly says their stomach hurts or constipation becomes worse during a really busy week.
Maybe travel throws their digestion completely off.
Or maybe they are exhausted, overstimulated, emotionally dysregulated, and their stomach seems to struggle right along with everything else.
That is because the autonomic nervous system changes depending on what the body believes it needs to do.
When the nervous system senses stress, the sympathetic—or “fight-or-flight”—side becomes more active.
That is exactly what it is supposed to do.
The problem is when a child has difficulty shifting out of that stress response.
Because digestion works best when the nervous system can transition back toward parasympathetic regulation—what we call “rest and digest.”
Kids encounter neurological stress from all kinds of places.
Physical stress from falls, injuries, sports, even the birth process.
Emotional stress from school, transitions, family changes, or busy schedules.
Chemical and environmental stress from illness, highly processed foods, medications, and other exposures.
We often simplify those accumulated stressors into thoughts, traumas, and toxins.
When enough stress stacks up and the nervous system has trouble adapting, we begin to see patterns of sympathetic dominance and dysregulation.
In neurologically focused chiropractic, we also evaluate for subluxation—areas of neurological tension and dysfunction that interfere with efficient brain-body communication.
And when the nervous system is struggling to regulate, the effects do not stay confined to one part of the body.
That is why you may see a child who is struggling with digestion also struggling with sleep, emotions, sensory processing, or immune resilience.
It is all connected through one master control system: the nervous system.
THIS IS WHY WE LOOK BEYOND THE GUT
If a child comes into our office struggling with constipation or stomach aches, we are obviously interested in their digestive history.
But we are also asking bigger questions.
How well is this child adapting to stress?
Is their nervous system spending too much time in sympathetic fight-or-flight?
How well are they shifting into parasympathetic regulation?
That is where our INSiGHT Scans become such an important part of what we do.
Instead of guessing based solely on symptoms, these scans give us objective information about patterns of neurological stress, autonomic function, neuromuscular tension, and adaptability.
We combine those findings with your child’s history and neurological assessment to get a much clearer picture of how their nervous system is functioning.
Once we understand those patterns, we build a care plan specifically around your child.
Our gentle, neurologically focused chiropractic adjustments are designed to address areas of tension and subluxation and support clearer communication between the brain and body.
The goal is not to “treat constipation” or chase a stomach ache.
The goal is to improve how the nervous system regulates and adapts.
Because when the nervous system is better able to move out of sympathetic stress and into a more balanced, regulated state, the systems it coordinates—including digestion—have a better environment in which to function.
To clarify, this does not mean nutrition does not matter.
Hydration matters.
Fiber, Movement, and sleep matters.
The microbiome matters.
But whether you are just beginning to look for answers or have already tried several approaches, it is important to look at the system that helps regulate your child’s gut in the first place.
That is why we say:
Brain first. Gut second.
If this sounds familiar for your child, give our team a call at 918-272-0303 to schedule their INSiGHT Scans.
And head to our website to check out our newest blog "The Brain-Gut Connection: How the Vagus Nerve Shapes Your Child’s Digestive Health" where we go even deeper into the vagus nerve, nervous system regulation, and your child’s brain-gut connection