Study on The Influencing Factors of Optokinetic Nystagmus
WANG Ruipeng
ZHU Xiaoquan
YAN Xiaobin
WANG Lu
CHEN Shan
TIAN Dawei
Abstract：Objective Vestibular function test system was used to investigate the differences of OKN tests under different ambient brightness(180 Lux,0 Lux),visual target direction(horizontal left,horizontal right),speed(20°/s,40°/s),etc.,providing a theoretical basis for establishing the reference range of OKN for pilot cadets.Methods A total of 54 healthy pilot cadets were recruited,and each subject underwent OKN test under eight different test conditions,and the effects of different influencing factors on OKN were analyzed.Results When the visual target direction and velocity were 40°/s horizontally to the left,there was a statistically significant difference in the gain value between the bright and dark room conditions(P=0.008).When the visual target direction and velocity were horizontal to the right 40°/s,there was a statistically significant difference in the gain value between the bright and dark room conditions(P=0.011).When the visual target velocity in dark room was 40°/s,there was a statistically significant difference in gain value between left and right visual target(P=0.048).When the visual target direction in the bright room was horizontal to the left,there was a statistically significant difference in the gain value between the visual target velocity of 20°/s and 40°/s(P＜0.001).When the visual target direction was horizontal to the right in the bright room,there was a statistically significant difference in the gain value between the visual target velocity of 20°/s and 40°/s(P＜0.001).When the visual target direction in the dark room was horizontal to the left,the gain values at the visual target velocity of 20°/s and 40°/s were significantly different(P＜0.001).When the target direction was horizontal to the right in the dark room,there was a statistically significant difference between the gain values at 20°/s and 40°/s(P＜0.001).There was significant difference between the asymmetry values at 20°/s and 40°/s in bright room(P＜0.001).There was no significant difference between the asymmetry values at 20°/s and 40°/s in the dark room(P=0.145).Conclusion Different ambient brightness,visual target direction and speed may affect OKN test.
Keywords：optokinetic nystagmusinfluence factorbrightnessoccurrence mechanism
Publication Date：2025-04-15
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 197-200 )