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Subjective Visual Vertical (SVV)

The Subjective Visual Vertical (SVV) test evaluates the otolith system, which is crucial for perceiving verticality. This test is essential for detecting abnormal subjective tilt and diagnosing various vestibular disorders.

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When is SVV required

  • Otolithic Disorders: Assesses and diagnoses otolithic dysfunction.
  • Chronic Dizziness: Evaluates chronic dizziness conditions.
  • Peripheral Vestibular Insult: Identifies the side of vestibular damage during the acute stage.
  • Compensated Vestibular Disorders: Aids in diagnosing vestibular disorders that have compensated over time.
  • Rehabilitation Effectiveness: Assesses the impact of rehabilitation on vestibular function.

Tests Included

  • Static SVV (Head Vertical): Measures vertical perception with the head in a vertical position.
  • Dynamic SVV (Head Vertical with Optokinetic Background): Assesses vertical perception with a moving background.
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Design Features

  • Tubular Vision Goggle: Equipped with a gyroscope and accelerometer.
  • Head Angle Measurement: Ensures correct head positioning during testing.

For doctors and patients, the NeuroEquilibrium SVV test provides a reliable method to assess and diagnose disorders related to the perception of verticality and chronic dizziness.

Frequently Asked Questions

What should I do before taking the SVV test?

You don’t have to do anything special before the SVV test, but don’t forget the instructions your doctor gives you. Try to avoid any heavy meals and caffeine before the test, since they may make your balance unstable. Wear clothes that are not tight and don’t forget your glasses if you are a regular user. Since the test is short, easy, and painless, there’s nothing to be worried about.

During the SVV test, you will be guided to a dark room and told to focus on a line that you see through goggles. You will notice that the line is not standing straight, so your job is to make it look upright to you. Doing this task helps doctors learn how your body keeps itself balanced. The exam is very short and never involves any pain.

The SVV test measures your ability to perceive vertical alignment accurately. If your perception is off by more than 2 degrees, it could indicate conditions such as vestibular neuritis or benign paroxysmal positional vertigo (BPPV). These issues can cause dizziness or balance problems. The test helps doctors identify the cause and determine the best way to support your recovery.

The type of treatment you receive will rely on the main cause of your condition. For instance, BPPV is usually cared for with head movements that move tiny crystals in your inner ear and help improve balance fast. In some situations, your doctor may advise you to do exercises to help your brain balance your sense of balance. Your doctor will choose the best treatment for you because of your condition.

After the test, your doctor will review the results with you and explain what they mean. Some treatments, such as the Epley maneuver, can provide almost immediate relief, helping you feel better right away. Following your doctor’s advice and attending all follow-up appointments will support continued improvement. With the right care, many people experience significant recovery and regain their balance.

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