Nineteen patients who had undergone unilateral vestibular deafferentation surgery (UVD) which left their VOR impaired were included in this study. The following patient reported outcome measures were used to record dizziness and confidence with daily activities: the Dizziness Handicap Inventory, the Activity Specific Balance Confidence Scale.
Dynamic Visual Acuity Tests (DVA) were conducted for gaze-stability with and without head movement. The Dynamic Gait Index was used to assess functional gait and balance with head movement. Accessory outcome measures included the Timed Up and Go and Gait Speed and Endurance tests. Physiological measures specific to the vestibular system were were the Video Head Impulse Test (vHIT) and the Vestibular Evoked Myogenic Potential Test.
In the exercise group, participants each underwent vestibular physiotherapy (VPT) for six weeks following their surgical procedures, including 5 weeks of gaze stability exercises as well as static and dynamic postural exercises, including a home exercise programme. Each group completed two active gaze stability exercises a day, two static balance exercises, and two dynamic balance exercises. Each exercise was performed for 3 repetitions of 1.5 minutes of duration every day.