For Those Who Need to Know the “Why”

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GRT LIGHT

Yes, We're Going to Talk About Light Again

The GRT Lite sits at an interesting intersection between two areas we've already discussed:

Photobiomodulation

and

Neurological rehabilitation.

The device was developed by Dr. George Gonzalez in association with the Quantum Neurology approach.

But before discussing how it is used clinically, let's start with what the device physically does.

What's Inside the GRT Lite?

The GRT Lite Pro 8A contains four LEDs:

Two Red LEDs

These produce visible red light around the red portion of the photobiomodulation spectrum.

Two Infrared LEDs

These produce near-infrared light around 850 nanometers.

You can't see those infrared wavelengths with your eyes.

That doesn't mean they aren't on.

Please resist the urge to stare into the device to check.

The unit has several operating modes that allow the LEDs to operate continuously or in different pulsed patterns.

Red Light and Infrared Light Aren't the Same

Different wavelengths interact differently with biological tissue.

Red wavelengths tend to be absorbed more superficially.

Near-infrared wavelengths generally have greater potential for tissue penetration.

Once light enters tissue, however, things get complicated.

Some light is:

• Reflected

• Absorbed

• Scattered

So the amount of light leaving the device isn't necessarily the amount reaching a deeper biological target.

That's an important concept whenever we're discussing photobiomodulation.

What Happens When Light Reaches Tissue?

As we discussed in our larger PBM section, red and near-infrared light can interact with biological molecules called chromophores.

One important area of research involves the mitochondria.

Mitochondria help cells produce ATP—the energy cells use to perform their jobs.

Photobiomodulation research suggests that appropriate red and near-infrared light exposure can influence:

• Mitochondrial activity

• Cellular signaling

• Nitric oxide pathways

• Reactive oxygen species signaling

• Inflammatory signaling

• Tissue-repair processes

That doesn't mean every red light produces every one of these effects in every tissue.

Wavelength matters.

Dose matters.

Power matters.

Location matters.

And the condition being treated matters.

Why Does the GRT Lite Pulse?

Here's where this device becomes particularly interesting.

The GRT Lite has continuous-light modes as well as several programmed pulsed modes.

Instead of simply leaving the LEDs continuously illuminated, the device can switch the light on and off at predetermined rates.

In Quantum Neurology protocols, different pulsed modes may be incorporated into different treatment procedures.

There are plausible biological reasons to investigate pulsed versus continuous PBM, and researchers have studied both approaches.

But we need to make an important distinction:

A pulse frequency is not automatically an organ frequency.

Seeing a device operate at a particular number of Hertz doesn't mean that frequency has been proven to correspond specifically with the liver, vagus nerve, adrenal gland or another organ.

That's a much larger scientific claim.

So when we use pulsed modes, we treat them as different light-delivery parameters rather than claiming that we're “tuning” an organ to its proper frequency.

The Neurological Side

Now things get particularly interesting.

The nervous system is constantly receiving information.

Light can provide biological input.

Touch provides input.

Movement provides input.

Pressure provides input.

Vibration provides input.

Vision provides input.

The brain integrates all of it.

In neurological rehabilitation, we can sometimes combine different forms of stimulation while performing a movement, sensory or neurological task.

That's one way the GRT Lite may be incorporated into treatment.

We establish a neurological finding.

Provide a controlled input.

And then test the neurological finding again.

Is the GRT Lite FDA Cleared?

Yes.

The GRT Lite Model Pro 8A is an FDA-cleared Class II medical device.

But this is where wording matters.

Its FDA clearance is specifically for adjunctive use in providing temporary relief of:

Minor chronic neck and shoulder pain of musculoskeletal origin

and

Minor chronic hand and wrist pain associated with carpal tunnel syndrome.

That's what FDA clearance establishes.

It does not mean the FDA has cleared the GRT Lite to treat:

• Liver disease

• Hormone disorders

• Vagus nerve dysfunction

• Brain disorders

• Cranial dysfunction

• Immune disorders

• Specific organ dysfunction

• Every neurological condition

The device may be incorporated into broader clinical approaches, but those applications should not be confused with its FDA-cleared indications.

That's an important distinction.

Why Do We Sometimes Use It in Neurological Treatment?

Because neurological rehabilitation frequently works by providing the nervous system with a stimulus and observing the response.

Think about physical therapy.

A therapist might ask someone to perform a movement.

Then add resistance.

Then repeat the movement.

The resistance isn't diagnosing the problem.

It's an input.

The therapist observes how the nervous system responds.

We can apply the same basic experimental thinking here.

Establish a baseline.

Apply an input.

Repeat the test.

Observe the response.

That makes the treatment testable.

What About Muscle Testing?

The GRT Lite is sometimes used within treatment systems that incorporate manual muscle testing.

Manual muscle testing can provide useful information about gross muscle strength and neurological function when performed using standardized procedures.

But very subtle changes in muscle response are more difficult to measure reliably.

That means we shouldn't say:

“The muscle became strong, therefore we proved that the light fixed the organ.”

Those are several scientific leaps rolled into one sentence.

Instead:

“The patient's response changed following the stimulus.”

Interesting.

Now we see whether that change is reproducible and whether it translates into meaningful function.

Why Reassessment Is So Important

Suppose a patient has limited cervical rotation.

We measure it.

Then we perform a treatment involving the GRT Lite.

Then we measure cervical rotation again.

That's useful information.

Or maybe we're measuring:

• Balance

• Eye movement

• Coordination

• Grip strength

• Pain

• Muscle strength

• Sensory response

• Range of motion

We want something repeatable.

Because otherwise it's very easy for both the practitioner and patient to see what they expect to see.

Humans are wonderfully complicated.

We're also remarkably good at convincing ourselves we're right.

Measurement helps.

How We Use the GRT Lite

Our approach follows a simple framework.

1. Assess

Identify the patient's symptoms and establish a measurable finding.

2. Choose the Target

Determine what anatomical or neurological area we're attempting to influence.

3. Select the Input

Choose the appropriate red, infrared or pulsed-light setting based upon the treatment being performed.

4. Apply

Deliver the light according to the treatment protocol.

5. Reassess

Repeat the original test.

6. Ask the Important Question

Did anything meaningful change?

If yes, we have useful information.

If no, we don't simply keep shining the light because the protocol says we should.

Where Does the GRT Lite Fit?

The GRT Lite isn't a replacement for diagnosis.

It isn't a replacement for rehabilitation.

And it isn't a magical flashlight.

It's a controlled light-delivery tool.

Its established medical indication involves adjunctive pain therapy.

Its use within neurological rehabilitation represents a broader clinical application that we evaluate through careful assessment and reassessment.

That's exactly how we want to approach technology:

Understand what it does.

Know what has been proven.

Be honest about what is still being investigated.

Measure what happens to the patient.

Because a treatment doesn't become more scientific because it has buttons and blinking lights.

It becomes more scientific when we ask good questions and measure the answers.

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Frequency Vials

Welcome to One of the More Unusual Tools in Our Office

We'll acknowledge the obvious.

Holding a tiny glass vial near someone and testing a muscle sounds strange.

It should raise questions.

We think that's healthy.

So let's talk about what these vials are, how they're used, and—most importantly—what we can and cannot conclude from them.

Where Did Frequency Vial Testing Come From?

Frequency-vial testing developed largely within applied kinesiology and other energetic testing systems.

Rather than keeping hundreds of actual foods, chemicals and other substances in the treatment room, practitioners began using small prepared vials as standardized testing stimuli.

Different systems developed different methods for preparing and using those vials.

One system we use comes from the work of Dr. Michael Lebowitz, who developed an applied-kinesiology protocol involving frequency vials.

Other vial systems have developed separately.

The underlying clinical idea is similar:

Introduce a stimulus and observe whether a previously established response changes.

What Does “Frequency” Mean?

This is where terminology can get confusing.

The word frequency normally has a very specific meaning in physics:

The number of repeating cycles occurring during a period of time, usually measured in Hertz.

When frequency-vial systems use the word, however, they're generally referring to a proposed energetic or electromagnetic signature associated with a substance.

That's not the same thing as saying:

“Gluten vibrates at exactly 42 Hz.”

Or:

“Your liver operates at 73 Hz.”

Those would require measurable physical evidence.

So we don't pretend that every vial label corresponds to a scientifically established biological frequency.

How Does the Examination Work?

A typical examination begins with an indicator muscle.

1. Establish the Baseline

We first determine whether we can obtain a repeatable muscle response.

That's essential.

If the starting test isn't repeatable, anything that follows becomes difficult to interpret.

2. Introduce the Vial

A selected vial is brought into the testing procedure.

Depending upon the system being used, the vial may be held or positioned at a particular location.

3. Repeat the Same Test

The examiner repeats the muscle test as consistently as possible.

4. Observe the Response

Did the muscle response change?

Did it remain the same?

Did another neurological finding change?

5. Investigate When Appropriate

If something potentially important appears, we decide whether it deserves confirmation through conventional clinical evaluation.

That's the step that keeps an interesting observation from becoming an unsupported diagnosis.

Why Would a Muscle Response Change?

That's the big question.

Proponents of frequency-vial testing propose that exposure to information represented by the vial changes the body's neurological or energetic response.

That hypothesis has not been established sufficiently to use vial testing as a diagnostic method.

There are also more conventional factors that can influence manual muscle testing.

Muscle output can change with:

• Examiner force

• Patient effort

• Joint position

• Fatigue

• Expectation

• Attention

• Pain

• Timing

• Testing technique

• Normal biological variability

That makes standardization extremely important.

If we're going to use a subtle change in muscle response as information, we should do everything possible to make the test itself consistent.

What Does the Research Say?

This is an area where we need to distinguish:

Clinical tradition

from

validated diagnostic testing.

Applied kinesiology has been used by clinicians for decades.

There is research investigating manual muscle testing and different forms of applied kinesiology.

But evidence does not currently establish frequency-vial muscle testing as a reliable diagnostic test for allergies, infections, toxicity, nutrient deficiencies or organ disease.

That's why we don't use it that way.

Interestingly, even developers and practitioners of these systems have cautioned against making definitive diagnoses from vial responses.

That's a distinction we strongly agree with.

Here's an Example

Imagine we test a patient with a vial labeled:

Gluten.

Their muscle response changes.

What have we proven?

Not that they have celiac disease.

Not that they have a wheat allergy.

Not even that they're clinically gluten-sensitive.

We've observed:

Their response changed during this particular test.

If their history also raises concern about gluten-related disease, appropriate testing might include validated medical evaluation.

That's how an unusual finding becomes a reasonable clinical question rather than an unsupported conclusion.

Another Example

Suppose a vial labeled:

Mercury

changes a muscle response.

That does not establish mercury toxicity.

If the patient's history suggests meaningful exposure and toxicity is a legitimate concern, appropriate medical testing would be the next step.

The vial doesn't replace the laboratory.

It may simply cause us to ask:

“Is this worth investigating?”

Why Use Them At All?

That's a fair question.

In our office, frequency vials are used as one possible source of sensory/testing input within a larger examination.

They never stand alone.

We're still interested in:

• History

• Symptoms

• Physical examination

• Neurological examination

• Laboratory findings

• Imaging when appropriate

• Functional testing

• Response to treatment

The vial is one data point.

And because its diagnostic validity remains uncertain, we weight that data point accordingly.

The Biggest Trap: Confirmation Bias

This deserves its own section.

Humans naturally notice information that supports what we already believe.

Practitioners aren't immune to that.

Neither are patients.

If the practitioner knows they're holding the “gluten” vial and expects the patient's muscle to weaken, that expectation could unintentionally affect testing.

That's why blinded testing is scientifically valuable.

Ideally:

The patient doesn't know which vial is being tested.

Even better:

The examiner doesn't know either.

Now we're asking a much cleaner question:

Does the response still occur when nobody knows what result they're supposed to expect?

That's good science.

And we're very comfortable asking that question.

Can We Test the Testing?

Absolutely.

In fact, we should.

If a particular vial produces a response:

Test it again.

Change the order.

Use a control vial.

Blind the examiner when practical.

Repeat it on another visit.

And when the finding suggests something medically important:

Confirm it with validated testing.

The more extraordinary the conclusion, the stronger the evidence should be.

How We Use Frequency Vials

Our approach is intentionally conservative.

1. Establish a Reproducible Baseline

Make sure the initial examination finding can actually be repeated.

2. Introduce the Stimulus

Add the appropriate vial according to the testing protocol.

3. Repeat the Test

Use the same position and testing procedure.

4. Look for Reproducibility

Can we produce the same response again?

5. Don't Overinterpret It

A vial response is an observation—not a diagnosis.

6. Confirm Important Findings

When a potential finding would change medical treatment, nutrition, supplementation or another significant healthcare decision, use appropriate validated testing.

What Are We Trying to Accomplish?

Frequency-vial assessment isn't about asking a tiny bottle to tell us what's wrong with you.

We're using another stimulus and observing how your body responds.

Sometimes that gives us an interesting clue.

Sometimes it doesn't.

And a clue is exactly what we call it:

A reason to look closer.

Because good clinical care isn't about proving that our favorite technique is right.

It's about getting closer to the truth about what's happening with the patient.