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Tests and diagnosis
By Mayo Clinic staffDoctors can usually determine the cause of dizziness. To pinpoint what's causing your symptoms, you may be asked to perform positioning tests in the office so that your doctor can observe you and ask how you feel when you tip your head back or lie on a particular side.
You may need additional tests in a vestibular and balance laboratory, including:
- Posturography testing. This test tells your doctor which parts of the balance system you rely on the most and which parts may be giving you problems. You stand in your bare feet on a special platform and work to keep your balance under various conditions.
- Rotary-chair testing. During this test, you sit in a computer-controlled chair that moves very slowly in a full circle. At faster speeds, it moves back and forth in a very small arc.
- Eye movement testing. Your eye movements in response to certain stimuli also can provide helpful information in making a diagnosis. For example, your doctor may watch the path of your eyes when you track a moving object. You may also be given what's called a caloric test, in which the movement of your eyes is observed when cold and warm water are delivered to your ear canal at different times.
In some cases, you may need magnetic resonance imaging (MRI). This technique uses a magnetic field and radio waves to create cross-sectional images of your head and body. Your doctor can use these detailed, clear images to identify and diagnose a wide range of conditions. MRI may be performed to rule out acoustic neuroma - a noncancerous brain tumor of the vestibular nerve, which carries sound from the inner ear to the brain - or other abnormalities in the brain that may be the cause of vertigo.
Even if no cause is found or if your dizziness persists, prescription drugs and other treatments may make your symptoms more manageable.
