IRCT2016013126279N1 IRCT 2016-04-26 Tehran University of Medical Sciences (TUMS) Effects of rehabilitation treatment on vestibulo-ocular reflex Comparison of the vestibulo-ocular reflex in patients with posterior semicircular canal benign paroxysmal positional vertigo before and after rehabilitation treatment assessed by video head impulse test 2016-01-21 anticipated 30 Complete https://irct.ir/trial/21817 interventional Randomization: Not randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Single, Purpose: Treatment. N/A Benign paroxysmal positional vertigo. With the patient sitting upright, the head is turned 45 degrees to the patient’s affected side. The patient is then moved from the sitting position to the supine position with the head hanging below the top end of the examination table at an angle of 20 degrees. The head is turned 90 degrees toward the unaffected left side.The head is then turned another 90 degrees, to a face-down position,and the trunk is turned 90 degrees in the same direction, so that the patient is lying on the unaffected side. The patient is then moved to the sitting position. Each position should be maintained until the induced nystagmus and vertigo resolve, but always for a minimum of 30 seconds. The rahabilitation procedure is performed in maximum two sessions (with one week interval)..