Wolfe J W, Engelken E J, Olson J W, Allen J P
Ann Otol Rhinol Laryngol. 1978 Nov-Dec;87(6 Pt 1):837-44. doi: 10.1177/000348947808700611.
Twenty-one normal subjects were evaluated for pursuit tracking performance at frequencies of .2, .4, .8, 1.2 and 1.6 Hz. Measures of phase (lead or lag of target), gain (amplitude of response) and spectral purity (distortion of smooth tracking) were obtained by a cross-power spectrum analysis of the stimulus input and the eye movement output. It was determined that normal subjects could quite adequately track a target moving at .4 Hz. After establishing this parameter for normals, 43 patients with central and peripheral pathology related to the vestibulo-oculomotor system were tested at this frequency. Data revealed that not only central lesions but also peripheral labyrinthine impairment could cause a marked decrement in pursuit tracking ability. Also, marked changes in tracking were evident following both central and peripheral surgical procedures.
对21名正常受试者在0.2、0.4、0.8、1.2和1.6赫兹频率下的跟踪性能进行了评估。通过对刺激输入和眼球运动输出进行互功率谱分析，获得了相位（目标的超前或滞后）、增益（反应幅度）和频谱纯度（平滑跟踪的失真）的测量值。结果确定，正常受试者能够很好地跟踪以0.4赫兹移动的目标。在确定了正常受试者的这一参数后，对43名与前庭眼动系统相关的中枢和外周病变患者在该频率下进行了测试。数据显示，不仅中枢病变，而且外周迷路损伤都可能导致跟踪能力显著下降。此外，中枢和外周手术后跟踪都有明显变化。
