Auditory and Vestibular Research 2017. 26(3):.

Normative vestibulo-ocular reflex data in 6-12 year-old children using video head-impulse test
Siyamak Alizadeh, Nariman Rahbar, Mohsen Ahadi, Seyyed Jalal Sameni

Abstract


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 there is lack of data in children. The aim of this study was to establish normative VOR data for 6-12 year-old children.
Methods: Vestibulo-ocular reflex gain in horizontal and vertical planes was assessed on 60 healthy children without history of balance and hearing problems, through applying sudden, fast, and unpredictable head impulses.
Results: The mean VOR gain was 0.99 (SD=0.05), 0.98 (SD=0.06), and 0.93 (SD=0.06) for horizontal, anterior, and posterior canals, respectively. Gain differences between genders were not statistically significant.
Conclusion: Regarding the results of this study and due to the simplicity and tolerability of vHIT in children, it seems that vHIT can be used as a screening tool to diagnose vestibular disorders in children. In addition, it seems that mean VOR gain is greater in horizontal canal than vertical canal.


Keywords


Semicircular canal; vestibulo-ocular reflex gain; video head-impulse test

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