Vertebral artery test
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The Vertebral Artery Test or Wallenberg Test is a physical exam for vertebral artery insufficiency.
Commonly, the VA test involves cervical spine motion to an end-range position of rotation, extension or a combination of both. At this point, the physician assesses for vertebrobasilar insufficiency (VBI) symptoms. If the patient has VBI symptoms during the test, it is considered a positive result and a contraindication for cervical manipulation.
The specifics of VA testing vary among authors.
The test is positive if the patient complains of dizziness, visual changes, or nystagmus occurs.