For Those Who Need to Know the “Why”

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Meet One of Your Nervous System's Earliest Programs

Here's where things get interesting.

Long before you learned to walk, throw a ball, write your name, or find your phone while it was already in your hand, your nervous system was learning how to control your body.

Primitive reflexes were part of that process.

These automatic movements appear during fetal development and early infancy. As the brain and nervous system mature, voluntary movement and higher-level postural control gradually take over.

The Spinal Galant Reflex—also called the Galant reflex or truncal incurvation reflex—is one of them.

What Does the Reflex Actually Do?

In an infant, stimulation alongside the spine produces a predictable response.

Stroke down one side of the back and the baby's trunk bends toward the stimulated side.

That response doesn't require the baby to decide to move.

It happens automatically.

The reflex is present before or around birth and normally becomes inhibited during early infancy as higher levels of the nervous system develop greater control over movement.

In other words, the nervous system doesn't necessarily throw the old program away.

It learns not to let that program run the show.

Why Do We Test It Later?

This is where we need to separate what we know from what we're still studying.

Primitive reflex examination is a legitimate part of neurological assessment in infants.

An absent, unusually strong, asymmetric, or persistent primitive reflex can provide information about neurological development.

Researchers have also identified residual primitive reflex responses in some older children and have studied possible relationships with motor development, posture, coordination, learning, and other developmental measures.

But there is an important word in that sentence:

Relationship.

Finding two things together does not prove that one caused the other.

For example, if a child has poor coordination and a retained primitive reflex, we cannot automatically say:

"The reflex caused the coordination problem."

The reflex may instead be one clue that helps us understand how that child's nervous system is organizing movement.

That's a much more scientifically responsible—and ultimately much more useful—way to look at it.

How Is the Spinal Galant Reflex Assessed?

The traditional examination involves applying a controlled stimulus just to the side of the spine and observing the response of the trunk and pelvis.

We evaluate:

Presence
Is a recognizable response present?

Symmetry
Does the right side respond similarly to the left?

Magnitude
Is the response subtle or pronounced?

Repeatability
Does the same stimulus produce a similar response when repeated?

Context
Does the finding correspond with other neurological, postural, sensory, or movement findings?

That last one matters.

A reflex finding should be one piece of the puzzle—not the entire puzzle.

What Does “Reflex Integration” Mean?

You'll hear the term primitive reflex integration used in chiropractic, occupational therapy, physical therapy, functional neurology, and developmental movement programs.

The basic idea is that repeated sensory and movement experiences may help the nervous system develop better control over an unwanted automatic response.

That concept fits broadly with something we know very well about the nervous system:

The nervous system can change.

This ability is called neuroplasticity.

Your brain continually modifies neural connections in response to movement, sensory information, practice, learning, injury, and experience.

However, neuroplasticity itself does not prove that every primitive-reflex exercise being promoted online works.

That's an important distinction.

Our goal isn't simply to perform an exercise because someone labeled it a “brain exercise.”

We want a reason for doing it.

Our Approach: Test → Stimulate → Move → Retest

When a retained Spinal Galant response appears relevant to the patient's examination, treatment may involve carefully selected sensory stimulation and movement.

The exact protocol depends on the patient's examination and response.

A clinical sequence may look something like this:

1. Establish a baseline

Test the Spinal Galant response on both sides.

2. Look for related findings

Evaluate relevant movement, balance, coordination, posture, sensory processing, muscle activation, and other neurological findings.

3. Apply the intervention

Use the selected sensory or movement-based exercise appropriate to the examination findings.

4. Reassess the reflex

Repeat the original test under the same conditions.

5. Reassess function

This is the really important part.

Did anything meaningful change?

A prettier reflex test is interesting.

Better function is what we actually care about.

What Does the Research Tell Us?

The existence and developmental role of primitive reflexes are well established.

The Spinal Galant reflex normally appears during early development and typically disappears during the first several months after birth.

Researchers have also found associations between persistent primitive reflexes and certain developmental or neurological findings.

For example, a prospective study following 204 high-risk infants found that patterns of persistent primitive reflexes—including retention of the Galant reflex—differed between normally developing children and children who later demonstrated certain neurological abnormalities.

Research has continued into school-aged children as well. A newer assessment scale developed for children ages 6–9 includes the Spinal Galant among seven primitive reflex dimensions. Initial testing showed good statistical reliability, although the scale has not yet received broad validation or endorsement as a standard neurological screening instrument.

There is also research examining associations between retained primitive reflexes and posture, trunk rotation, motor skills, and some learning measures.

But research on treating an isolated retained Spinal Galant reflex in otherwise healthy older children or adults is much less developed.

That means we should be cautious about promising that “integrating” this reflex will treat ADHD, eliminate bed-wetting, correct scoliosis, improve grades, or cure other conditions.

Those are much bigger claims than the current evidence allows us to make.

What we can do is use the reflex as one neurological finding, treat the patient rather than the test, and measure whether meaningful function changes.

What Outcome Are We Looking For?

Ultimately, we aren't chasing reflexes.

We're looking for better neurological organization.

Depending on why the patient came to us, meaningful changes might include improvements in:

• Movement quality

• Coordination

• Balance

• Postural control

• Symmetry

• Motor planning

• Tolerance of sensory input

• Functional movement tasks

And here's our favorite part:

We don't have to guess.

We can establish a baseline, provide an intervention, and measure again.

If the nervous system changes, we want to see it.

If the patient's function changes, that's even more important.

Because the goal isn't to create a perfect neurological test.

The goal is to help the person attached to the nervous system function better.