Written by Dr. Sam McDonald, DC (Colorado Chiropractic License CHR.0007574), Omega Functional Health.

You turn your head to check your blind spot and the world takes a half-second to catch up. You roll over in bed and the room swims. You look up at a high shelf and feel your stomach drop.

Many people with this kind of dizziness are told their inner ear checks out, or that it is probably stress. Often, nobody has tested the one reflex that is supposed to keep the world steady while your head moves.

That reflex is called the VOR. When it is not working well, it can explain a lot, including, for some people, why sleep has gotten worse too.

What is the VOR?

VOR stands for vestibulo-ocular reflex. It connects your inner ear balance sensors directly to the muscles that move your eyes.

Every time your head moves, the inner ear detects the motion and the VOR moves your eyes the same amount in the opposite direction, within a few thousandths of a second. That keeps your eyes locked on what you are looking at.

Think of the image stabilization on a phone camera. You can walk while filming and the video stays smooth because the camera is constantly correcting for your movement. The VOR is your built-in image stabilizer.

What is VOR dysfunction?

VOR dysfunction means that stabilizer is not keeping up. The eyes do not move quite far enough, or fast enough, to cancel out the head movement. The brain then has to make a quick catch-up eye movement to re-find the target.

Going back to the camera analogy, it is like the stabilization being turned off. The picture jumps every time the camera moves, and your brain has to work hard to make sense of it.

VOR problems can follow an inner ear infection or inflammation, a concussion or whiplash, certain medications, or simply aging of the balance system. Sometimes no single cause is ever identified.

How does a struggling VOR lead to dizziness with head movement and position changes?

When the VOR cannot stabilize your eyes, any head movement creates a mismatch. Your inner ear says “we moved this much,” but your eyes report a world that is slipping or bouncing. The brain reads that mismatch as dizziness, unsteadiness, or nausea.

That is why VOR-related dizziness tends to show up with movement rather than at rest:

• Turning your head quickly, such as checking traffic or answering someone behind you
• Rolling over in bed or lying down and sitting up
• Looking up or bending down
• Walking in busy places like grocery stores, where your eyes and head are constantly moving
• Reading or using a screen while in a moving car
• Feeling like vision blurs or bounces when you walk

Many people adapt without realizing it. They hold their head stiff, move slowly, and turn their whole body instead of their neck. That protects them from the dizziness, but it also loads the neck muscles all day and gives the VOR even less practice.

Is this the same as BPPV?

Not quite. BPPV (benign paroxysmal positional vertigo) is a mechanical inner ear problem where tiny crystals drift into the wrong canal and cause short, intense spins with specific position changes. It is common and usually treated with repositioning maneuvers.

VOR dysfunction is about how well the reflex itself performs. The two can overlap, and BPPV should be checked and treated when it is present. But many people whose positional dizziness never fully goes away after repositioning, or who never had BPPV to begin with, have a VOR that is not keeping up.

What does the VOR have to do with sleep?

This is a connection most people have never heard about. Part of it comes from research, and part comes from what we see in our own testing.

What we sometimes see during eye movement testing

A healthy VOR does one job. When your head turns side to side, your eyes move the exact opposite amount and stay level. During eye movement testing with video goggles, that is what we expect to see.

In some people, we see something else. While we test the side-to-side reflex, their eyes pull inward and cross, as if they were focusing on something right in front of their nose. In others, the eyes drift up or down even though the head is only turning side to side.

Neither of those should happen. In our clinical model, they suggest that the signal from the balance canals that sense turning is spilling over into neighboring circuits instead of staying in its lane.

Why that spillover may trigger fight or flight

When the eyes cross during side-to-side testing, the signal appears to be spilling into the midbrain, the area that controls focusing up close. The midbrain also sits near the circuits that drive the fight-or-flight response, so in our view that spillover may come with a jolt of alarm.

An up or down drift suggests spillover into the canals that sense tipping forward and backward. If those canals are firing when you are only turning your head, the brain may briefly register that you are falling forward or backward. Falling is about as clear a threat signal as the body has, so again the nervous system reacts as if something is wrong.

Think of a smoke alarm accidentally wired into the same circuit as the toaster. Nothing is burning, but every time you make toast, the alarm goes off.

How this may pull you out of deep sleep

Now picture that wiring at night. You roll over and turn your head many times while you sleep, usually during the lighter stretches of the night. During REM sleep, your eyes move rapidly even when your head is still, and the vestibular system is active along with them. Animal research going back to the 1960s found that neurons in the vestibular nuclei, the same brainstem centers that drive the VOR, fire during REM sleep.

If each of those head turns and eye movements sets off a small fight-or-flight response, the brain may keep getting nudged out of deep, restorative sleep. People describe it as sleeping lightly, waking often, or getting up in the morning feeling like they never really rested.

What the research does and does not show

Research in people supports the broader connection. A large U.S. study found that adults with vestibular vertigo were more likely to report sleeping too little or too much. In a registry of people with chronic vestibular problems, about half reported poor sleep quality, and sleep was worse in those who had been dizzy for two years or longer. Researchers have also proposed that the balance system plays a real role in regulating sleep.

To be clear about what is established and what is not: the link between balance problems and poor sleep is supported by research, and so is vestibular activity during REM sleep. The specific chain described above, from what we see in eye movement testing to a fight-or-flight response to disrupted sleep, comes from our clinical observations and has not been studied directly. We share it because it fits what we see and gives people a useful way to understand their symptoms, not as a proven mechanism.

What does the conventional approach look like?

Dizziness is often first managed with medication to reduce nausea and spinning, an ear or neurological evaluation, and repositioning maneuvers if BPPV is found. Vestibular rehabilitation is the standard, well-supported treatment for vestibular hypofunction, and clinical practice guidelines strongly recommend it.

The gap we see most often is that the VOR is never directly measured, or the neck and posture are never looked at alongside it.

How do we determine whether your VOR is involved?

• Eye movement testing with video goggles, including how well your eyes hold steady and level during head movements
• Balance testing under different conditions, such as eyes closed or on an unstable surface
• A posture check of your weight distribution, hip and shoulder rotation, and head and neck tilt
• An upper neck examination, because neck position sense feeds into the same balance system
• A history that includes your sleep, not just your dizziness

If the VOR is underperforming, gaze stabilization exercises (a core part of vestibular rehab) can be chosen and tested against your specific results before they are assigned for home practice. This is one part of the Omega Method, alongside upper cervical chiropractic and focused shockwave.

Does this replace medical care for dizziness?

No. Physicians, ENT specialists, and neurologists play an important role in diagnosing dizziness. Sudden dizziness with slurred speech, facial drooping, weakness, double vision, a severe headache, or trouble walking can be a sign of stroke and is an emergency.

Who may benefit from VOR testing?

• Adults who get dizzy with head turns, rolling over, or looking up
• People whose positional dizziness lingered after BPPV treatment
• Anyone whose dizziness began after a concussion, whiplash, or inner ear illness
• People with ongoing dizziness who also sleep lightly or wake often

What does the research say?

VOR function can be measured precisely with tests such as the video head impulse test. Vestibular rehabilitation, including gaze stabilization exercises, has strong guideline support for people with vestibular hypofunction. Research links vestibular disorders with sleep disturbance, and classic animal studies show vestibular brainstem activity during REM sleep. Whether improving the VOR directly improves sleep has not been well studied yet.

What this approach does and does not claim

We do not claim that VOR training cures dizziness or insomnia, or that any result is guaranteed. We do commit to testing what is usually assumed, explaining what we find, and re-checking along the way.

Serving Wheat Ridge and the Denver metro

If you are trying to decide who to see, our guide to choosing a vertigo specialist near you explains the options and what to ask. And if you are wondering how long this is supposed to last, how long does vertigo last? gives a realistic timeline.

Omega Functional Health is located at 6650 W 44th Ave #2b in Wheat Ridge, serving Denver, Arvada, Lakewood, Golden, Littleton, and surrounding Colorado communities.

Schedule a Complimentary Consultation

References

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• Hall CD, Herdman SJ, Whitney SL, et al. Vestibular rehabilitation for peripheral vestibular hypofunction: an updated clinical practice guideline from the Academy of Neurologic Physical Therapy of the American Physical Therapy Association. Journal of Neurologic Physical Therapy. 2022;46(2):118-177.
• Bhattacharyya N, Gubbels SP, Schwartz SR, et al. Clinical practice guideline: benign paroxysmal positional vertigo (update). Otolaryngology-Head and Neck Surgery. 2017;156(3 Suppl):S1-S47.
• Bizzi E, Pompeiano O, Somogyi I. Vestibular nuclei: activity of single neurons during natural sleep and wakefulness. Science. 1964;145(3630):414-415.
• Besnard S, Tighilet B, Chabbert C, et al. The balance of sleep: role of the vestibular sensory system. Sleep Medicine Reviews. 2018;42:220-228.
• Albathi M, Agrawal Y. Vestibular vertigo is associated with abnormal sleep duration. Journal of Vestibular Research. 2017;27(2-3):127-135.
• Katzenberger B, Brosch F, Besnard S, Grill E. Chronic vestibular hypofunction is associated with impaired sleep: results from the DizzyReg patient registry. Journal of Clinical Medicine. 2023;12(18):5903.