The Dix-Hallpike maneuver is the definitive test for posterior canal BPPV. When performed in the office, the sensitivity and specificity are 79% to 82% and 71% to 75%, respectively. The maneuver begins with the patient seated and head turned 45 degrees to the side being tested so as to isolate and vertically orient that side's posterior canal. The patient is then laid back into a supine position with the tested ear down. Classic teaching suggests hanging the head back over the edge of the bed, but this is not necessary when performing the Dix-Hallpike test alone. Overextension of the neck may even elicit a false positive response from the contralateral side. Clinicians should also be cautious of patients with neck, back, abdominal, and hip problems as this may require special care during the diagnostic maneuver.