R Taylor Madison, Berryhill Marian, Mathew Dennis, G Murray Nicholas
School of Public Health, University of Nevada, Reno, NV, USA.
Department of Psychology, University of Nevada, Reno, NV, USA.
J Ophthalmic Vis Res. 2024 Jun 21;19(2):227-234. doi: 10.18502/jovr.v19i2.12348. eCollection 2024 Apr-Jun.
Although there is evidence that sport-related concussion (SRC) affects oculomotor function and perceptual ability, experiments are often poorly controlled and are not replicable. This study aims to test the hypothesis that there are decreased values when assessing oculomotor impairment indicating poorer performance in SRC patients.
Fifteen DI athletes presenting with SRC (7 females, 8 males) and 15 student volunteers (CON) (12 females, 3 males) completed a dynamic visual acuity (DVA) task that involved answering the direction of a moving stimulus (Landolt C) while wearing a head-mounted binocular eye tracker. There were 120 trials total with 60 trials presenting at 30º per second and 60 presenting at 90º per second. Various eye movement measurements, including horizontal smooth pursuit eye movements (SPEM) gain and saccadic peak velocity, were analyzed between groups using univariate ANOVAs. Saccade count in SPEM trials, accuracy, and vision were analyzed using Kruskal-Wallis tests.
There was no statistical difference in saccadic peak velocity: SRC = 414.7 42º/s, CON = 406.6 40.6º/s. A significant difference was found between SRC patients and healthy controls in horizontal SPEM gain (SRC = 0.9 0.04, CON = 0.86 0.03, F(1,28) = 7.243, = 0.012) indicating that patients demonstrated compensatory eye movements when tracking the target. There were significantly more saccades in all SPEM trials ( = 0.001).
SRCoculomotor deficits manifest as elevated horizontal SPEM gain when assessed within 48 hours of injury and compared to healthy controls within the same age range SRC demonstrates altered oculomotor ability. While accurate in tracking a stimulus, SRC patients may conduct less controlled eye movements.
尽管有证据表明与运动相关的脑震荡（SRC）会影响眼球运动功能和感知能力，但实验往往控制不佳且无法重复。本研究旨在检验这一假设，即在评估眼球运动障碍时，SRC患者的值会降低，表明其表现较差。
15名患有SRC的大学运动员（7名女性，8名男性）和15名学生志愿者（对照组）（12名女性，3名男性）完成了一项动态视力（DVA）任务，该任务要求在佩戴头戴式双眼眼动仪的同时回答移动刺激（兰道环C）的方向。总共有120次试验，其中60次试验以每秒30°的速度呈现，60次试验以每秒90°的速度呈现。使用单因素方差分析对两组之间的各种眼动测量指标进行分析，包括水平平滑追踪眼动（SPEM）增益和扫视峰值速度。使用Kruskal-Wallis检验分析SPEM试验中的扫视次数、准确性和视力。
扫视峰值速度无统计学差异：SRC组 = 414.7 ± 42°/秒，对照组 = 406.6 ± 40.6°/秒。在水平SPEM增益方面，SRC患者与健康对照组之间存在显著差异（SRC组 = 0.9 ± 0.04，对照组 = 0.86 ± 0.03，F(1,28) = 7.243，P = 0.012），表明患者在跟踪目标时表现出代偿性眼动。在所有SPEM试验中，扫视次数显著更多（P = 0.001）。
SRC导致的眼球运动缺陷在受伤后48小时内进行评估时表现为水平SPEM增益升高，与同年龄范围的健康对照组相比，SRC患者的眼球运动能力发生了改变。虽然SRC患者在跟踪刺激时准确，但他们的眼动控制可能较差。
