- 期刊
Assessment of Vestibulo-Ocular Reflex Function in Ball Sports Athletes
球類運動員之前庭動眼反射功能評估
摘要
Vestibulo-ocular reflex (VOR) generates compensatory eye movements in response to head movements, and thus allowing eyes to continue focusing on an object of interest. VOR is a primary parameter for neurologic function and effective sport performance in ball sports athletes, related to gaze stability and visual acuity. This study aimed to determine the VOR function by monitoring the reaction duration of postrotary nystagmus (PRN) elicited by a rotary chair. Eighteen college ball sports athletes (mean age = 22.1 ± 2.0 years; 6 females and 12 males) and 18 age- and gender-matched college students (non-ball sports athletes, mean age = 21.4 ± 2.1 years; 6 females and 12 males) were recruited in this study. The induction of PRN by vestibular stimulation was adapted to measure the vestibular input during passive head rotation by a rotary chair in both clockwise (CW) and counterclockwise (CCW) directions with a 30-min interval. The reaction duration of PRN after CW and CCW chair rotations was assessed, and changes in heart rate (HR), blood pressure (BP), and oxyhemoglobin saturation (SpO_2) of the subjects were measured to determine the physical conditions before and after the test. In the results, we found no significant differences in HR, BP, and SpO_2 after CW and CCW rotations compared with measurements before the test in both groups. However, ball sports athletes in both CW and CCW rotations exhibited significantly shorter duration of PRN compared with non-ball sports athletes. We speculate that the faster recovery time of PRN in ball sports athletes may be related to the rapid signal processing in the central nervous system. These findings might have implications for understanding the neurological basis of the visuomotor function that affects performance in ball sports athletes. Further studies are necessary to determine the specific parameters influencing sensorimotor functions of ball sports athletes, which will be taken into consideration when designing a training program.
並列摘要
前庭動眼反射（vestibulo-ocularreflex, VOR）乃為一種眼睛因應頭部運動產生之補償性眼球運動，其功能為使眼睛可在頭部移動時繼續聚焦在感興趣的物體上。這種反應與凝視穩定性和視敏度高度相關，為球類運動員神經功能和運動表現的重要參數。本研究的目的為透過監測旋轉椅測試引起的旋轉後眼球震顫（postrotary nystagmus, PRN）的反應時間，來確定VOR的功能。本研究招募18名大學球類運動員（平均年齡22.1±2.0歲，6名女性和12名男性）和18名年齡及性別配對的大學生（平均年齡為21.4±2.1歲）。透過旋轉椅在順時針及逆時針方向之被動頭部旋轉方式，刺激前庭以誘發PRN。記錄下順時針及逆時針旋轉後之PRN持續時間及測量受試者的心跳、血壓和氧合血紅素飽和度，以監測試驗前後的身體狀況。結果發現兩組受試者在旋轉刺激後之心跳次數、血壓和氧合血紅素飽和度，與旋轉前的數值則無顯著差異。而球類運動員與非球員相比，球類運動員在旋轉後，明顯表現出較短的PRN反應時間。我們推測球類運動員PRN反應時間較短可能與其中樞神經系統的信號處理速度較快有關。這些發現可能有助於理解影響多種球類運動員表現的視覺運動功能之神經學基礎。需要進一步利用更多的前庭測試的研究，來決定球類運動員感覺運動功能的特異性參數，這些參數將作為訓練計畫的一部分。