The Vertebral Artery Test or Wallenberg Test is a physical exam for vertebral artery insufficiency.
Commonly VA involves cervical spine motion to an end-range position of rotation, extension or a combination of both. At this point, the physician assesses for VBI symptoms. If the patient has VBI symptoms during the test, it is considered a positive result and a contraindication for cervical manipulation.[1]
The specifics of VA testing vary among authors.[2]
The test is positive if the patient complains of dizziness, visual changes, or nystagmus occurs.