Diagnosis

Your doctor may do a series of tests to determine the cause of your dizziness. During a physical exam, your doctor will likely look for:

• Signs and symptoms of dizziness that are prompted by eye or head movements and then decrease in less than one minute
• Dizziness with specific eye movements that occur when you lie on your back with your head turned to one side and tipped slightly over the edge of the examination bed
• Involuntary movements of your eyes from side to side
• Inability to control your eye movements

If your doctor can't find the cause of your signs and symptoms, he or she may order additional testing, such as:

• Electronystagmography (ENG) or videonystagmography (VNG). The purpose of these tests is to detect abnormal eye movement. ENG (which uses electrodes) or VNG (which uses small cameras) can help determine if dizziness is due to inner ear disease by measuring involuntary eye movements while your head is placed in different positions or your balance organs are stimulated with water or air.
• Magnetic resonance imaging (MRI). This test uses a magnetic field and radio waves to create cross-sectional images of your head and body. Your doctor can use these images to identify and diagnose a range of conditions. MRI may be performed to rule out other possible causes of vertigo.