Tehran University of Medical Sciences Auditory and Vestibular Research 2423-480X 26 3 2017 06 10 145 150 EN Siyamak Alizadeh Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Nariman Rahbar Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Mohsen Ahadi Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Seyyed Jalal Sameni Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran 2017 01 24 2017 03 08 Background and Aim: The video head-impulse test (vHIT) is a useful clinical tool to measure vestibulo-ocular reflex (VOR) gain that is defined as the ratio of eye velocity to head velocity. Although normative data are available for VOR gain, most studies only report horizontal semicircular canal VOR in adults and overlooked children. Hence, this study aimed at establishing normative VOR data for 6-12 years old children. Methods: Vestibulo-ocular reflex gain in horizontal and vertical planes was assessed on 60 healthy children without a history of balance and hearing problems using sudden, fast, and unpredictable head impulses. Results: The mean and standard deviation of VOR gains were 0.99 (0.05), 0.98 (0.06), and 0.93 (0.06) for horizontal, anterior, and posterior canals, respectively. Gain differences between genders were not statistically significant. Conclusion: The simplicity and tolerability of vHIT in children showed that it can be used as a screening tool to diagnose vestibular disorders in children. In addition, it was seen that mean VOR gain is greater in horizontal canal than vertical canal. https://avr.tums.ac.ir/index.php/avr/article/view/190 https://avr.tums.ac.ir/index.php/avr/article/download/190/90