Caloric Test – What It Shows in VNG is part of the vertigo and vestibular glossary reviewed for patient education by Dr. Prateek Porwal, ENT and Vertigo Specialist.

The caloric test checks each horizontal canal and vestibular nerve pathway by using warm and cool stimulation in the ear.

On this page

What caloric test means

The caloric test checks each horizontal canal and vestibular nerve pathway by using warm and cool stimulation in the ear. The term is useful because vertigo is a symptom, not one single disease. A clear word like caloric test helps connect the symptom story with the examination and the right next test.

For patients, the main point is not to memorize the anatomy. The main point is to know whether the word points toward BPPV, an inner-ear balance disorder, a hearing-and-balance disorder, or a warning sign that needs urgent review.

Why it matters in vertigo care

It can show whether one inner ear is weaker than the other, which helps in vestibular neuritis, chronic imbalance and unclear vertigo. This is why a short glossary definition is not enough. The same dizzy feeling can come from loose ear crystals, vestibular nerve weakness, migraine biology, blood pressure problems, medicine effects, anxiety-related dizziness or central neurological disease.

When caloric test is relevant, the doctor still has to match it with timing, triggers, hearing symptoms, neurological signs and examination findings.

How I use this finding in clinic

In clinic, I interpret the caloric test with symptoms and examination because an abnormal result does not automatically name the disease. I also check whether the pattern fits the patient’s age, medicines, fall risk, migraine history, ear symptoms and previous vertigo attacks.

This approach reduces two common mistakes: calling every dizziness attack BPPV, or treating every vertigo patient with only tablets without finding the actual mechanism.

What patients should do next

The test can cause temporary spinning or nausea. That reaction usually settles after the test. A one-sided weakness may lead to a vestibular rehab plan or further evaluation depending on the clinical picture.

Bring details about the first attack, attack duration, head-position triggers, nausea, hearing change, tinnitus, headache, neck limitations, recent infection, head injury and current medicines. These details often matter more than a single scan or blood test.

This glossary page is for patient education only. It does not replace examination by a qualified doctor, especially when dizziness is new, severe, recurrent or linked with neurological symptoms.