Balance and Dizziness Assessment

What is Dizziness?

“Dizziness” is one of those words that gets used to describe half a dozen different experiences — which is part of what makes it so tricky. Clinically, the distinctions matter enormously. Vertigo is the spinning sensation, the unmistakable feeling that the room is rotating around you, and it almost always traces back to the vestibular system. Presyncope — that swimmy, about-to-black-out feeling — tends to point toward the heart or blood pressure. Disequilibrium is different again: a persistent unsteadiness, often without any particular head sensation, that involves vision, proprioception, or how the brain weaves those signals together.

Why bother drawing these lines? Because the treatment for vertigo and the treatment for presyncope have essentially nothing in common. Conflate them, and you end up chasing the wrong diagnosis for months.

Causes of Dizziness

The inner ear is a marvel — and a surprisingly fragile one. BPPV (benign paroxysmal positional vertigo) is the most common culprit by a wide margin, responsible for somewhere between 17% and 42% of dizziness cases seen in specialty clinics (Bhattacharyya et al., 2017). The mechanism is almost absurdly mechanical: tiny calcium crystals migrate into the wrong part of the inner ear and trigger brief but intense spinning whenever the head moves.

Vestibular neuritis hits differently — a sudden, sustained vertigo that can last days, typically following a viral illness. Ménière’s disease announces itself as a quartet: spinning, fluctuating hearing loss, tinnitus, and a blocked feeling in the ear. Vestibular migraine, meanwhile, is chronically underdiagnosed, partly because the vertigo often arrives without any headache — patients spend years being told nothing is wrong.

And then there’s the question that can’t be ignored: could this be central? Cerebellar problems, MS, posterior circulation strokes — roughly 3–5% of patients presenting with dizziness in emergency departments turn out to have a posterior fossa stroke (Kerber et al., 2006). That number should command attention.

What is Balance and Dizziness Testing?

Your balance depends on three systems talking to each other constantly: the vestibular system in the inner ear, your vision, and the proprioceptive signals from your muscles and joints. When one of those systems fails — or when the brain loses track of how to reconcile conflicting input — things go wrong. Testing isn’t just about confirming that balance is off. It’s about locating exactly where the breakdown is, so treatment can be targeted rather than guessed at.

For BPPV specifically, the diagnosis and the fix can happen in the same appointment. That’s not a minor point.

What is Balance and Dizziness Testing?

Videonystagmography (VNG) is the workhorse. Infrared cameras track eye movements while the patient moves through a series of positions and, crucially, while warm and cool air or water are introduced into each ear canal. This caloric test excites each labyrinth independently and exposes asymmetries that would otherwise stay hidden.

Video Head Impulse Testing (vHIT) works at a different frequency range — rapid, small head rotations, a high-speed camera, and the telltale corrective eye movements that appear when a vestibular nerve isn’t doing its job properly.

VEMP testing (cervical and ocular) targets the otolith organs specifically — the parts of the inner ear that sense linear acceleration and gravity rather than rotation. Conditions like Ménière’s disease and superior canal dehiscence can look normal on standard canal testing and only reveal themselves here. This is why pairing vestibular assessment with a Diagnostic Hearing Evaluation is often clinically essential: many vestibular disorders carry an auditory component that a balance test alone won’t capture.

Computerized Dynamic Posturography takes a step back and asks: how does all of this actually affect your ability to stand and move? It systematically removes or distorts visual and proprioceptive input to isolate what the vestibular system is contributing — and how well the brain is compensating.

Who Needs Balance and Dizziness Testing?

The honest answer? More people than currently get it. Many patients sit with recurring episodes for a year or more before seeking evaluation, either because they normalized the symptoms or because a previous clinician didn’t pursue it. Recurrent vertigo, unexplained falls, persistent unsteadiness, dizziness triggered by head movement — all of these warrant proper investigation.

Older adults are a particular concern. Falls are the leading cause of injury-related death in adults over 65 (CDC, 2023), and vestibular dysfunction — which is both common and often correctable — contributes meaningfully to that risk. There’s something genuinely frustrating about a preventable fall that happens because a treatable inner ear condition was never diagnosed.

Balance and Dizziness Testing: What to Expect

Plan for 60–90 minutes. The appointment opens with a detailed history — when episodes happen, how long they last, what triggers them, what medications you take. This part isn’t filler. The pattern of symptoms often generates the leading hypothesis before any equipment is switched on.

Clinical examination comes next — eye movements, coordination, positional testing. Then instrumented assessment, performed in sequence based on what the history suggests. Some tests will briefly reproduce your symptoms; that’s intentional, and it’s how diagnoses get confirmed. The audiologist walks you through each step, and nothing is done without explanation. Where same-day treatment is appropriate, it happens before you leave.

How to Prepare for a Balance Assessment

48 Hours Prior to the Assessment

Some medications — antihistamines, meclizine, benzodiazepines — suppress vestibular function and can quietly distort test results. Ideally, these are paused 48 hours before the appointment, but only after checking with whoever prescribed them. Don’t stop medications that serve another purpose without guidance. Alcohol also needs to go — its effects on nystagmus last longer than most people realize.

24 Hours Before the Assessment

Skip the caffeine. It affects the vestibulo-ocular reflex in ways that can muddy caloric results. Same goes for nicotine where possible. If you wear contact lenses, either remove them before testing or bring glasses — the infrared cameras need a clear view of your eyes.

On the Day of the Assessment

Eat something light two to three hours beforehand. Not nothing — positional testing on an empty stomach is its own kind of miserable — but not a full meal either. Wear comfortable clothes. And if you’re prone to bad episodes, consider having someone drive you, though most patients leave without any trouble.